Read these two in this specific order, tho not a sequel they're kinda connected, also don't be put off by the art at the start, it changes for the better in just a few chapters :
Song of Reverberation
https://www.mangago.zone/read-manga/song_of_reverberation/
The Promise
https://www.mangago.zone/read-manga/the_promise/
also my favs list is basically all power bottoms :
https://www.mangago.zone/home/mangalist/2758080/
Mentally strong, physically weak try “rainbow city”
But if you wanted buff Uke try.
Stakeout
Codename: Anastasia
Guiding hazard
The dawn split the night
I was reborn as his highness the prince’s evil little dragon
Big apple
Nerd project
Breaking through the clouds 2: swallow the sea
Not buff Uke but like Uke that can hold his own, you get what I mean
recommend me some manhwa where the uke are not weak and actually act like a man