Summer Code Men's Striped Thong Low Rise Elastic Waistband Underwear

amazon.com/Summer-Code-Underwear-Breathable-Underpants/dp/B09H4994DC have a roomy pouch and 25% spandex helps too. amazon.com/Summer-Code-Striped-Waistband-Underwear/dp/B088H6JTXK has a roomy pouch. Aside from that, the rmac suggestion is good. Some of the Obviously brand products are roomy too.