Here are the numbers for global WebP and AVIF support, according to Can I Use:
WebP – Approximately 96.30% of web users use a browser that supports WebP.
AVIF – Approximately 79.81% of web users use a browser that supports AVIF.
There is no point in switching to the AVIF format now, maybe in 5...
The issue has been resolved!
Just go to the database Table ps_ets_paymentmethod_lang, and change everything latin1_swedish_ci to utf8mb4_unicode_ci. We save and everything works.