In RepU, open your widget and click Copy next to the embed snippet.
In Framer, open Project Settings, choose Custom Code, and click Add Script. Paste your code, name it RepU, choose End of <body> tag, and click Save.
Click Publish in the top right, then open your live site to see your Google reviews.
Check your live site in a private window, not the Framer editor or Preview. A domain-locked widget only shows on your own domain, not your framer.app address.
Custom domains need a paid Site plan. If you are on the free plan, upgrade and connect your domain, then check again.