Uniform Colors is locked on My Account?

I'm having the same problem on PS5/PS4 and PC. You normally unlock the quests at class rank 10. At level 20, you get the additional quests for the epic sets. You'll see this when you reach level 20, but it's not shown in the quests. When I got all classes to level 20 on PC, support had to manually unlock them. I've also reported the issue to support. I hope this gets resolved as soon as possible.

ElliotLH​ Hope dies last ;) On PC, the level 20 missions were more important to me than the level 10 missions. Luckily, support released them for me. I'm just hoping that at least a small hotfix will be added or that we can get them released later.

Perhaps, but as development is no longer carried out for BFV, the chances of them releasing a hotfix for this small bug and others after so long is unlikely. Hope may well die last, but I personally feel it is best to temper your expectations accordingly. “To keep false hopes is to prolong misery”, after all. 

Maybe. I'll stick with the older versions, even though BF5 has serious issues with bugs and balancing. It's still a lot of fun, and I'm up for a few rounds with friends because I get a certain nostalgia factor. Even if there are no more updates to fix the major problems or content, at least bug fixing should be possible somewhere :)