In RepU, open your widget, choose light or dark and left or right, then click Copy next to the embed snippet.
Create a page for your footer and add a T123 block from Other in the Block Library. Paste your code into it. Then go to Site Settings, then Header and Footer, and set that page as your footer.
Need more detail? See the official Tilda guide.
Republish all pages, not just the footer page, then open your live site to see your Google reviews.
Check your live site in a private window, not the editor or preview. A domain-locked widget only shows on your own domain.
Republish every page, not just the footer page. Check pages are not set to hide the footer.