Settings look good for the chime. Does the skybell still ring outside?
I would check the digital adapter to ensure its still attached properly and doesn’t appear damaged.
After that, I would delete the skybell from the Alarm.com account (through Video Device Info in Alarm.com) factory reset the camera and learn it back in to be safe.
Then factory reset the SkyBell (hold the button down for ~80 seconds until the LED flashes yellow.) Once it reboots it should flash Red/Green indicating that it is ready to be learned in again. After setting it back up, does the chime inside function as it should?
If factory reset doesnt fix it, I would look at replacing the digital adapter before the skybell itself, given the cost and likelihood that it is the adapter causing the issue.
As for the new ADC doorbell camera, there is no release date for it. I know COVID has pushed their timetable back for it. AFAIK that doorbell is still in beta testing but we will certainly post more information as it is made available.