👑[Enhancement] Revert to or Enable old family/liberary share

Hi, I've been a multi-account user for a long time, back when Steam had some serious regional price discrimination.
Recently, I accidentally created a NEW steam family, it fxxked up all my sharing. Now I have to login to different account to play games.
The new family share doesn't function in my case, as my other accounts are in a different region.
Steam says the new one **completely replace** the old one, but it seems to me they exist at the same time, I just need a way to toggle it back to the older version. Here's my discovery.

09/26/2024

I have main account A, alt account B, C.
I enabled NEW family sharing on A, lost access to lib B, C.
I thought I could just use the new family function, hence enabled new sharing on B.
Steam tells me since they are in a different region, B cannot join A's family.
I deleted A's family, re-apply for B's lib, here's what I got.

I then re-apply for C's lib, notice C didn't have new family function enabled. It succeed.

A and B's family page looks like this

While C's looks like this

It seems to me that they've just disabled a layout, is there a way to enable this layout?

The issue names no files, tests, or entry points. First determine whether SteamTools can control Steam's old family-sharing mode; done would require a confirmed supported implementation or a documented limitation.

Written by the indexing model from the issue text.