You can get extra information on issues adding
&d=1 on the deep link.
Double check that you have filled all the fields in the Bravo Deep links settings, and uploaded all the files.
Be sure to fill the Team ID in Firebase project settings, without it the deep links won't work at all.
You can double check that the configuration file that Firebase generates exists opening in the browser the URL:
https://<your-firebase-deeplink-domain>.page.link/.well-known/apple-app-site-association, a file should be there and should have the correct bundle id.
For testing iOS deep links we recommend using the Notes app, pasting the link there and tapping on it, should trigger the deep link and open the app instead of the browser.
If still doesn't work, on the browser check if scrolling a banner appears on top, asking to choose to open the app instead, iOS remembers the last preference and if the first time due to an error the link was opened in the browser, it will open the browser.
Hopefully should work now!