Orbi RBR10 / RBS10 - fast satellite navigation

There is a setup:

RBR10, a router

Three-story home. The router is centrally positioned upstairs in a spacious game room.

4 satellites downstairs, evenly spaced out among a few rooms

3200 square foot home with roughly equal amounts of steps upstairs and downstairs

Problem: The router's download speed (which is definitely wired) is 450MB.

I can wirelessly connect to any satellite and use a speed test on my iPhone to obtain between 50 and 90 MB down.

I recently unplugged two of the satellite TVs and now only have one downstairs. I'm approaching 100 down, which is better but still not great. Now that my phone is connected to the satellite, I'm downstairs with a few walls separating me from sitting. Standing next to that, I'm around 180 degrees lower.

Already read so many discussions about this topic!