AMSAT operational status of all satellites: https://amsat.org/status/
Note: This is crowdsourced so it can be wrong. Submit your contact at bottom of page.
The TEVELs and PO-101 operate on a schedule: https://df2et.de/tevel/
Note: TEVEL-1 and TEVEL-8 were confirmed dead at launch by the owner.
ISS dedicated status page: https://ariss.org/current-status-of-iss-stations.html
ISS is the only current satellite that supports packet radio / APRS.
Maya 5 and Maya 6 are not operational yet, so are not included in satellites.txt in the CPS.
UVSQ-SAT has only been operational a couple of days a year so it’s not included in satellites.txt in the CPS.
AO-92 is dead because of failed batteries.