Distribution method on 3rd party platform for testing

After creating archive file in Xcode 13.0 for an app,I am following article below for exporting to ipa file:

https://wiki.genexus.com/commwiki/servlet/wiki?34616,HowTo%3A+Create+an+.ipa+file+from+XCode

A profile needs to be generated for distribution purpose. Since I don't own an iOS device (only have MacBook Big Sur) and would like to distribute outside of app store through 3rd party platform, what kind of distribution method shall I choose from below?

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distribute outside of app store through 3rd party platform

What sort of third-party platform?

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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
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