FastSpring is another alternative for SaaS & international taxes. I'm sure there's more besides Paddle & FastSpring. The idea is to look for a company that will act as the "merchant of record", not just a payment processor:

https://fastspring.com/tax-management/

You end up paying more to them than Stripe would charge, but it might be worth it if you just don't want to deal with that administrative headache.

(I'm not running a SaaS, but shareware / downloadable software companies have been dealing with international taxes for 15 years or more now, since the digital EU tax laws came in. The idea of global consumption taxes wasn't really a thing until then, so you only had to follow your own local tax rules in the early-mid 2000s.)