I built a tool a few years ago called RSS Lookup(https://www.rsslookup.com/) and recently made a few UI and feed detection updates to it. It's free, and allows you to paste any website URL and it automatically searches for feeds via meta tags, fallback paths, and hardcoded feeds for some popular sites.

It's also open-source(https://github.com/mratmeyer/rsslookup), has no ads, and doesn't track any URLs(uses Cloudflare Turnstile for abuse and Plausible for analytics).

Max