Yes!!
-They are wearing each others' favorite colours.
-the flowers mob wears are pink instead of red common meaning love, pink roses meaning happiness/trust, he's telling reigen he's giving him his all
-reigen is putting on an air of overconfidence but he's a nervous wreck, he can't stop overthinking too afraid he's not good enough for mob or that mob might realize that and leave him at the altar
-flowers everywhere!!! I don't see them too knowledge able in flower language reigen read a book once years ago but they both love plants, as they share their first married kiss the flowers overgrow over the venue, mob is too happy.
-mob couldn't write much for his vows, he's not good with words but reigen could still tell how happy he was to finally marry
-reigen tries really really reaaaally hard not to cry but ends up bawling, he had a long speech planned he even wanted to make people laugh but only managed to take the piece of paper he wrote it all on and give it to mob, mob read it it was a bit awkward for the guests to watch mob read for a while, once done mob swept reigen off his feet and crushed him into a hug/kiss
-they didn't invite many people though many people, they wanted it to be intimate
-they practiced for their first dance, but were too caught in the moment, the realization they took the last step to be each others' forever, they swayed with their foreheads pressed together.
-they couldn't wait to the wedding night, they had sex in the venue's bathroom, it was equal parts hot and filthy as it was extremely loving and tender

Oh I'm building a new mrm wedding inside my head thanks to it!
Let's see... Their wedding is in a garden full of flowers, they both love plants and the outdoors, they chose to wear each others colours instead of their own, they tried to be more traditional keeping apart on their last night, mob didn't want to but reigen convinced him it would be fun, mob can't wait to be married while reigen is nervous he'll mess something up and is also very insecure. In reigen's opinion it was silly to have either of them waiting at the altar so they decided to meet and walk together, mob can't help but rush to reigen and dip him over for a kiss before they even get to the altar, it leaves reigen very flustered as their vows are said, mob isn't good with words so his vows are very simple, Reigen can only say it to him so he hands him a piece of paper (folded too many times and almost ripped from nervousness) it's a bit confusing for the guests but everyone could see the love in their eyes. Ritsu and Teru are mob's best men, ekubo and seri are reigen's. Mob was all too eager to tell ritsu, ritsu wasn't happy about it, he'll never like reigen and get over his romantic love for his brother, teruki had a crush on mob and on reigen but is happy for them. Teru finds ritsu bitter and angry and on the verge of ruining everything and offers to fuck to let out some steam, it works a bit too well, but they have mixed feelings about it (they are both in relationships that go nowhere with shimazaki/shou)
Ekubo has a deal with the sg he got the body for the day, he's very very happy but acting aloof about it, sg's body is weak to alcohol ekubo drinks and ends up babbling how much he loves mob+rei.
Serizawa witnessed mob dragging reigen to the toilets for a quick one (he was in the other stall, he heard it all) and that is why he's so uncomfortable looking.
Mob and reigen practised for their first dance a lot, reigen insisted but the moment the music hit it felt like it was just them, the weight of their rings so present in their minds, they simply swayed to the music forheads pressed together.

Oh boy, I got into mp100 because back in 2016 I was really into osomatsu-san and I kept seeing these crossovers because reigen's va and osomatsu's are the same and it tickled my curiosity, the final push was knowing it was from the same author as opm and absolutely fell in love.
I got into mrm... I'd say about a month after I fully fell in love with the series? I was reluctant at first, it felt wrong like I was going too far (idk why cause I had agegaps ships i'd been obsessed with previously). Their relationship as a whole is the reason I love mp100 as much as I do, it was that smile reigen gives mob when he says "you have grown up", it was my "oh" moment with the series.
My favourite dessert is cheesecake 🍰