Not working Accent colour in android 10,
Check it : Settings / System / Developer Options / Theming
Yeah, many posts on this. Search the forum and you'll find them. Apparently not easy at all to implement.
Chill bro they are working on it, but one thing that I noticed is, when you download or move any file from internal to external after enabling any accent colour, I have seen the download bar colour in the notifications change.