NETGEAR Orbi RBK763S + Nighthawk M1

There appear to be two separate issues here:

1. Providing a higher capacity internet connection, either (a) using a cellular telephone service (LTE), or (b) using a satellite service (such as StarLink).
2. Providing adequate WiFi (and wired?) service to devices in a building which is not "WiFi friendly". (Stone walls are a serious problem for WiFi signals)

An LTE connection must be compatible with the cellular carrier.  I notice that Netgear's Nighthawk M1 Product Data Sheet does not claim compatibility with specific cellular carriers.

https://www.netgear.com/images/datasheet/mobile/MR1100_100NAS.pdf 

I would want assurance that this device would work with your carrier.

The user manual mentions that the M1 WiFi can be disabled (page 49)

https://www.downloads.netgear.com/files/GDC/MR1100/MR1100_UM_EN.pdf 

I cannot find any means to put this device into "bridge" or "passthrough" mode, so connecting a mesh WiFi system will result in what is called a "Double NAT" situation.  (internet search for details).  For many users, this is not an issue.  If it is, there are specific steps that can be taken.

Providing WiFi to "difficult buildings" can be really difficult.  Without knowing more about the physical layout, there is no way to predict what combination of WiFi access points will be required.