Perhaps I misrepresented the suggestion. I can understand why Soundcore would not provide it’s own lens service, as that’s way off being about sound. I only suggest you publish the frame size templates and possible some instructions etc so facilitate it simply be forwarded to a lens company.
That should bypass many disparate owners going to their own local unique opticians who all end up doing the identical step of measuring and the delay associated.
Also stating which Frames suit prescription. So on your website each frame has “suitable for prescription” or “not suitable for prescription” and when suitable the technical details required.