Open Trigger Action on Remote SMS Send

Hi,

Is it possible to trigger a Tasker action in response to outgoing SMS sent using the Join Chrome Extension?

Unsuccessful attempts:
- Tasker can trigger on SMS Success, but only for SMS sent by Tasker itself.
- Sending a remote SMS does not appear to pass an AutoApps command (e.g. jointextpush=:=).
- Sending a remote SMS does not appear to trigger the Join Tasker plugin's "Push Received" trigger.
- Join does not seem to broadcast any intents when receiving a remote SMS command?
- AutoNotification can intercept the toast notification that appears ("Sending SMS to number..."), but it does not appear to trigger unless the screen is on.
- Reading SMS on the Chrome extension no longer clears my SMS application's notification (I use Textra), so I cannot trigger on Notification Clear.

Is there any hook to detect this action in Tasker?
Many thanks.