my friend just started reading bl

Neko X Neko is pretty cute! It's a switch and is super wholesome!
https://www.mangago.zone/read-manga/neko_x_neko/

Some other ones to read:

Smyrna Capri: Takes awhile before it becomes so downright adorable and wholesome! It's colored and have some graphic sex stuff. A warning if they're not used to it yet!
https://www.mangago.zone/read-manga/smyrna_capri/

Define the Relationship: SO FREAKING ADORABLE!!!! The uke is such a freaking cinnamon bun that must be protected at all cost!!! This one is also colored and super duper graphic! I say hold off on this one if, again, they're not used to graphic sex scenes!
https://www.mangago.zone/read-manga/define_the_relationship/

Hero vs Villain: This one is so sweet and cute, but has a tiny bit of dark undertones that sometimes come from a fantasy world. Nothing super bad, though! This one will give you some laughs and isn't at all graphic! It's also colored!
https://www.mangago.zone/read-manga/hero_vs_villain/

Motekei Ouji No Renai Command: IT'S SO FREAKING CUTE FOR NO REASON!!! The uke for this one is such an adorable introvert! Some sex scenes exist here, but it's not nearly as graphic as the other recommendations!!
https://www.mangago.zone/read-manga/motekei_ouji_no_renai_command/

https://www.mangago.zone/read-manga/b_class_guide/
(guidverse manhwa with an ml who has a few screws loose,has quite a few graphic sex scenes)

https://www.mangago.zone/read-manga/iki_dekinai_no_wa_kimi_no_sei/
(shounen ai manga of a saxophone player and a flutist? if i rmrb correctly, quite a few sex scenes but not as graphic as no. 1)

https://www.mangago.zone/read-manga/tamaranai_no_wa_koi_na_no_ka/
(one of my personal favs, school life shounen ai with no smut, delinquent x top student)