Transitioning from ADT to Surety

  1. Is this system compatible with Surety/Alarm.com

No it is not. Compatible systems can be found here:

Assuming it is not, are there Surety-compatible panels that may run on the same MHz so not as many sensors (i.e. door/window) don’t have to be switched out?

I believe those use the 2.4Ghz SIX series sensors from Honeywell, which are not compatible with any Alarm.com compatible systems.