Xcode server bot's product unable to install in iOS 14

Recently I've started to work with Xcode server and Xcode bot.
I'm just using Xcode 12.3, no OS X server application.
I've configured bot correctly which generates IPA file of my iOS application. But when I try to install that IPA with

https://<my-macbook-air>.local/xcode

It always shows me error in iOS 14+ device.
I've downloaded and installed profile and manually trust certificate from Settings. But no luck on iOS 14+.
Even thought same IPA is being installed in iOS 13.3 device.

I read somewhere that iOS 14 uses TLS 1.3 by default for all SSL certificates, is that related to my problem? Does my Xcode server's self signed SSL is not supporting TLS 1.3?

How can I solve this problem?

Now I'm using Xcode 13.4 but still facing the same issue. I can not install on iOS 14 devices as well as I'm not able to install on iOS 15 devices. I've trusted "Xcode Server OTA Installation" but still facing issue.

Xcode server bot's product unable to install in iOS 14
 
 
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