Responses
If you're looking for non-romance:
https://www.mangago.zone/read-manga/amaama_to_inazuma/
https://www.mangago.zone/read-manga/chichi_kogusa/
If BL is ok with you, there's some here tagged single parent:
https://www.mangago.zone/home/mangalist/1008397/
I need something or some manga that is about a single dad or something something like that.tq(◍•ᴗ•◍)