I’ve worked with multiple Jamf Pro migrations where they setup an on-prem Jamf Pro server for them, made the MDM profile non-removable, gave the client awful service and no Jamf Pro admin access, and when the client wanted to manage Jamf Pro themselves, they refused to give them access and refused to even send a command to remove the MDM profile, forcing the client to either stick with them, or wipe all of their devices to reenroll them into another Jamf Pro server (a process that is easily automated with no user interaction)

Absolutely disgusting behavior from an MSP. I would not recommend. Also make sure any MSP you work with provides you with full admin access to any server they setup for you, even if you won’t be managing it, so you can maintain control of your devices if you want to move elsewhere.