Looking for good Valtor x Bloom fics is a specific quest, I get it. I spent way too much time hunting them down last year.
AO3 is the undisputed champ for quality and organization. The tagging system lets you filter for exactly what you want—enemies to lovers, post-'The Charmix' season, whatever your jam is. You'll find the real literary gems there, fics that seriously dive into the dark, complex dynamic instead of just cheap smut. I bookmarked this one author, their prose is almost poetic.
Wattpad has a different vibe. It's more hit-or-miss and heavy on the modern AUs or really tropey romance, which can be fun if you're in that mood. Sorting by reads helps find the popular ones, but the quality varies wildly. Some feel like they were written in a notes app during class.
I'd steer clear of FanFiction.net for this ship. The archive is old, the search is terrible, and most of the good writers have migrated. You'll just get frustrated digging through pages of poorly formatted stuff from 2008.