How can I game share with 3 Xbox consoles?

We have 3 xboxes in our house (SX and 2 SS) my kids have a SS each. I game and subscription share with my son (his account has the GPU sub on) however I’ve had to pay for GPU on my daughters console separately. In an ideal world we would all be able to game share but I do not know if this is possible and from research I don’t think it is but could be wrong.

Anyone got any experience with this?