Hello,
It seems that your issue is related to the CDN caching on your web-site -> https://prnt.sc/XRtjlIu4RCy5
Because if we inspect your kirki-style.css directly on the server there are good typography styles -> https://prnt.sc/b45hrxE-GMCN opposite to the one which is loaded on the site -> https://prnt.sc/2KJ4bXWqmPin
Please, clear your CDN cache or temporarily disable it while you are in develop state of the site.
Regards