can I add an orbi booster to my nighthawk AX8 AX 6000 router?

I recently upgraded from Nighthawk X6 to nighthawk AX 6000/AX8.  It has been a disapointment.  We have a 10,000+ SF house.  There are deadspots all over, the TV rarely works for streaming.  we can't ignore the problem With the coronavirus. Now I have 2 college kids home doing online work and my husband working online.  

My preference is to add some orbi boosters to our existing Nighthawk AX8 AX 6000.  Is there an orbi booster thart is compatible?

If not which orbi system would be a step up from my current Nighthawk.  I havent had it that long and the Best Buy rep said it was the best on the market at the time.