Yes, the monitoring center receives RF Jam signals but they are considered to be trouble conditions not alarms, even when the system is armed. I believe this is specified in the SIA standard for false alarm prevention. Most system trouble conditions are treated this way, except for Tamper signals which are treated as alarms when the system is armed. RF Jam signals are usually malfunction or environmental while Tamper signals more reliably indicate that someone is messing with the panel or a sensor.
If your Alarm.com account is configured to notify you about urgent system actions then you’ll be notified immediately about RF Jam signals and have the option of calling the police yourself. I would recommend verifying somehow first though because most RF Jam signals are not real break-ins.
That means your panel will sound an alarm (locally) if an RF Jam is detected. But it doesn’t change the signal sent to the monitoring center, which is still treated as a trouble condition. This setting requires the Jam Detection settings above it to also be enabled.
If you have a UL installation then pick 20/20. Otherwise, pick whichever one you like.