When you accepted their unlimited 5G offer from the MyJio app, they shifted your mobile data connection to CLAT from CGNAT. I am guessing Jio Airfiber uses the same tech stack as mobile data. Jio Fiber was never moved to CLAT from CGNAT, at least not that I know of.
This Chrome extension - IPvfoo- shows you the IP addresses of the domains/websites your browser is connecting to. It used to show me an address in the 64:: range, which is the CLAT reserved IP space. It was the translated IPv4 (IP of the CLAT relay server). Now, it shows me the public IPv4 of those websites in IPvfoo.