While there are probably lots of CAs that offer ACME these days, there are only a handful openly available ones. Checking them isn't that difficult, but checking all the CAs - no thanks 
- ISRG (Let's Encrypt)'s latest audit report lists DC locations in the USA
- BuyPass latest audit report lists locations in Norway
- ZeroSSL is a Sectigo Reseller. Sectigo's latest audit report lists DC locations in the USA, United Kingdom, The Netherlands plus offices in India, Romania, Canada and France
- SSL.com's latest audit report lists locations in the USA
- Google Trust Services latest audit report lists locations in USA, Belgium and Switzerland.