Yaoi

The Trapped Beast
https://www.mangago.zone/read-manga/the_trapped_beast/
(the officials are decensored, in case you wanna point out that you asked for yaoi. but jujucat stopped uploading them here after Ch 20, so you can read the continuation of the officials on ba2)

also, you may check out my lists for more mpreg, so you can browse which ones you haven't read yet:
1) https://www.mangago.zone/home/mangalist/2755401/
2) https://www.mangago.zone/home/mangalist/2886610/
3) https://www.mangago.zone/home/mangalist/2797467/