is there a bl where the uke has social anxiety, or is just very introverted?

Kimi no Tonari de Yurarete

rainbow city >:3 (SA in chap 3, best to skip) (no social anxiety, just very kept to himself)

https://www.mangago.zone/read-manga/tonari_no_metaller_san/

Harenai Sekai de Kimi Dake Mieru (Yaoi)

Fukutsu no Zono ( https://www.mangago.zone/read-manga/fukutsu_no_zono/)
(I don’t know if that is considered one really)

Please Pay Attention To Me

Mihanada Pectolite (Yaoi)

thats all I can think of ⁄(⁄ ⁄·⁄ω⁄·⁄ ⁄)⁄ (might not be what you’re looking for)