for mangas: bookwalker (eng/jp), mangaup, shounen jump, viz manga, and google play books! im also fortunate enough that my local library has a really good collection of mangas too so i go there often to check what they have.

for manhwas ive answered it before here ! https://retrospring.net/@lapileon/a/112067389630095555

for animes: just crunchyroll and netflix