How to make builds for iOS testers with support for multiple Pull Requests?

Question

iOS

When developing programs, I use the system 1 pull request = 1 new feature (or fix of an old one) in an iOS application, there is a situation when there are several branches with features at the same time and testers must check them independently. What is the most convenient way to deliver builds in this case?
There are services like TestFlight from Apple, however, they imply the presence of one beta version, which is constantly updated, and we can have 2-3-10 such versions (depending on the number of Pull Requests and I would like to somehow integrate this with GitHub or mail, so that even a not very knowledgeable person from the company can easily install

it.Creating a new version in TestFlight every time is not an option, especially considering that the first time you need to go through the review.

Maybe other services have support for such a scenario? During front-end development, I used Heroku, it is very conveniently implemented there: when creating a PR, this build is automatically deployed, a link is laid out on it in the github, and as long as the PR exists, this build exists and is updated, close the PR - the build is deleted.