Series X Can't make my home xbox

Are you offline? Is the Series X your home Xbox?

No my Xbox series x is online and on the same network as my Xbox one and my Xbox series x is set as my home Xbox

so i can't switch my xbox one to an xbox series X, i am planning on removing home console and factory resetting it

Okay so just to make sure I understand.....

I make my sons Series S (MY) Home Console.....

He can play Online with me if I am on my PC signed in as me.
I can also sign into my own Series X and play my games.

We wont be playing together on XBOX on both Series S and Series X.

I have this exact issue. His is my setup:

My son has a One S

I have a Series X

I was able to set the One S as my home xbox

I added his account to the Series X. Went to setting and then to my home xbox. At first, it is checked, then I get the circle, and the check mark is removed. Click on make this my home xbox on the Series X using his account, the circle spins, and then back to the "unchecked" box.

Checking his (One S), my account still has that xbox as my home xbox.

Reset networking, reset MAC address, flushed ARP cache on my switch and router, restarted all of those devices, and reset the Series X (both hard power cycle and factory reset). No luck.

Is it due to his account technically being a Xbox One profile and mine a Series X?

Also, my son's account is a child account but, unrestricted.

Make 1 of the Xboxes the "Home Xbox". When done make sure privacy and sharing preferences are set on the "Home Xbox" to share. After that all the games on the "Home Xbox" are accessible by any profile added to that "Home Xbox. The other (non "Home Xbox) has to have the game purchased under that 2nd Xboxes main profile or purchased as a gift from any profile and sent to a chosen profile to be downloaded when that profile signs onto their Xbox. I have an Xbox One X in my living room controlled by my 2nd account profile. I have a Series X in my game room "Home Xbox" controlled by my 1st profile. Example; I log on the Series X with that main profile and buy/download Division 2 with all expansions and passes. I then log on the One X with my 2nd profile (main for that One X) and buy/download Division 2 with out the expansion and passes. So now a family member adds their profile to the One X, if they own the Division 2 they can play it and as much of the content that I have purchased. To play the full version on the One X someone has to buy it for that console, However anyone else that logs onto the One X with their profile that doesn't own any of Division 2 content can't play it at all. They can launch it but it will direct them to the store. Now adding Ultimate Game Pass to the One X allows profiles to download and play any games available through game pass. Remember my Series X will allow any profile added and signed onto can play any games and use the Ultimate Game Pass to download and play from my Series X. One X has limitations for profiles due to that profile owners games owned and which games are in the One X. Confusing ........ ?