The issuing bank for loans isn't necessarily where the company keeps the majority of their assets.

OP's claim was that Stripe Capital's loan underwriter was SVB, hence why they weren't extending loans to SVB affected customers.

Stripe itself was, and probably still is, using Wells Fargo for US corporate accounting, per https://qr.ae/pvERsZ

Stripe is still saying they are extending loans via Capital with no change to recent terms they've been offering. Confirmed with our account manager this afternoon, just in case.