How many tvs can you connect to 1 satelite

"as many as you have".  Sorry to be snide.  It is possible to "connect" well over 100 devices to an Orbi WiFi system.  What matters is what the TV's are doing.  Each television that is streaming internet content consumes a certain amount of bandwidth.  STandard definition TV consumes only a fraction of the bandwidth that 4K video does.  Orbi cannot possibly provide more bandwidth than ISP provides.  i.e. if the network connection is 25MB/sec, the Orbi cannot possibly do more than that.

It also depends on which Orbi model it is.  The"50" series have a greater maximum "backhaul" connection rate than other Orbi's.

There is probably a specific situation in mind.  i.e. which specific Orbi models are connected to which specific internet modem at what rate?

How many televisions are planned to do what?