If I were conducting this valuation, I haven't done this myself, but I most definitely read our 409A valuations closely. I'd imagine that the outside firm hired to conduct the analysis on Fintech would use data like:
BLOCK (down 49% in last 6 months)
PAYPAL (down 60% in last 6 months)
COINBASE (down 75% in last 6 months)
INTUIT (down 30% in last 6 months)
VISA (down 5% in last 6 months)
SHOPIFY (down 70% in last 6 months)
Everyone at these fintechs, has seen the valuation of their company drop significantly (with the exceptions of VISA in the last 6 months. It's possible that stripe's performance is closer to VISA than to SHOPIFY, but only dropping 30% is likely pretty generous given the broader market.
Anyone with options at any of these public companies is dealing with the same challenges.