When the first app you install on your XSX is the insider app and you register for AsA on...

No why would there be

Only pc and consoles have insiders programs because they are ms oses

Windows insiders and xbox insiders

You can search insiders hub on the xbox store

You need to have it installed on a PC or a xbox because that's how you register your console

Having the app on pc also lets you register and unregister for xbox since settings has its own insiders settings

Yes. When you buy a game wherever it can (PC, Mobile, app) it always ask first where you can install then game. This is obviously when you have more than one device registered on your account.

If you're enrolled in the Insider Program and the console is registered, you will still get the insider updates. I would recommend logging in or "signing up" for the program to check the app to verify that your console is in the enrollment that you want,
be that in a release ring, or not registered for an insider build. You can have the app and be an insider without having an early release build ring assigned, and is great for providing feedback to the team when you encounter an error regardless if you're
on an insider build or not.

So I would say yes, especially to check that it is configured in the enrollment you want.

I paste the same answer I made to a post you tacked on to.

There will never be a OSU1 file available to consoles enrolled in any Xbox Insider previews. The console has to be unenrolled from the preview before attempting an Offline System Update (OSU).

Normally, when the console is unenrolled the latest General Availability (GA) OS will be installed via the internet so a OSU is not required if your network connection is stable.

If you have unsuccessfully attempted to use a OSU1 file without unenrolling from Insiders, you need to factory reset the console.

The factory reset will install a base OS and if you have a stable network connection the console will download and install the latest OS available.

Reset console to factory defaults

System Update Solution .. Take note of the Insider section of this link

"Last Alpha Skip Ahead Update was early March 2023"

This is not true. There have been several ASA Insider updates since March 2023. There was one yesterday 20th April 2023. I suggest you visit the Xbox Insiders Reddit site regularly and /or check the Insider app everyday if you want to stay in the ASA Insider preview.

There will never be a OSU1 file available to consoles enrolled in any Xbox Insider previews. The console has to be unenrolled from the preview before attempting an Offline System Update (OSU).

Normally, when the console is unenrolled the latest General Availability (GA) OS will be installed via the internet so a OSU is not required if your network connection is stable.

If you have unsuccessfully attempted to use a OSU1 file without unenrolling from Insiders, you need to factory reset the console.

The factory reset will install a base OS and if you have a stable network connection the console will download and install the latest OS available.

Reset console to factory defaults

System Update Solution .. Take note of the Insider section of this link

"Last Alpha Skip Ahead Update was early March 2023"

This is not true. There have been several ASA Insider updates since March 2023. There was one yesterday 20th April 2023. I suggest you visit the Xbox Insiders Reddit site regularly and /or check the Insider app everyday if you want to stay in the ASA Insider preview.