I'm not entirely sure if it is the case here, but many tools that intercept TLS have you trust a certificate in the OS or browser level that they then use as a MITM on the proxy to be able to decrypt the requests
I previously used Proxyman [1] on iOS to the http requests send over TLS. It worked rather nicely. Proxyman in this case starts a VPN which handles all the traffic. It uses custom certificate to decrypt the messages.
[1] https://proxyman.io/