some cute ones i rather enjoyed:
https://www.mangago.me/read-manga/on_the_way_to_meet_mom/ (kr, ~31 ch, alien population and a single human child)
https://www.mangago.me/read-manga/tondemo_skill_de_isekai_hourou_meshi_sui_no_daibouken/ (jp, >67 ch, has anime adaptation, dude collects creatures like they're pokemon (family))
Welcome to demon school Iruma kun
Spy x family
On My way to meet mom
Hello! Veterinarian!
https://www.mangago.me/read-manga/hello_veterinarian/
Ojisama to neko
https://www.mangago.me/read-manga/ojisama_to_neko/
The friendly winter
https://www.mangago.me/read-manga/the_friendly_winter/
children fluff
https://www.mangago.me/home/mangalist/1408361/
friendship / other type of fluff
https://www.mangago.me/home/mangalist/1751016/
Enjoy darling!
Uhm recommend me something wholesome pls no romance kinda like family like and stuff ty