GAME PASS for XBOX - Create Game Mode/Edit options?

Aloha to the Forum and Mods. I am a regular on XBOX X/S... I did some investigation into the Portal Experience Host option on XBOX X/S, and from what I see, there are no real instructions on how to complete the Create Custom Game Edit/Mode setup and then actually use a unique mode in which I alone created on the XBOX platform. I read some search results and ended up here but after finding half of the general answers to my initial questions, I still need to know what the correct steps are for accessing the Portal Game Edit/Mode to just make use of the Host server option to create some sort of new game modes and play them on my XBOX (and PC) even if I am playing BF with the Game pass (for now) every day.

I have not planned on buying the PC platform edition yet, but I might if it is required. Is the answer merely to buy the PC version of BF2042, to get the Portal Mode Editor to work for me on XBOX x/s?

I suppose this may have been asked many times before, but I couldn't get directed to that info.

If buying the PC version is the first step to create any game mode for XBOX platform (or NOT), what are the benefits and obvious Host limitations on XBOX with or without it?