Some activities not syncing to Strava

I have completed 3 activities this morning, and all 3 have been uploaded to my Garmin Connect account without issue.

However, only 2 of them have been uploaded to Strava.

2 runs from my Garmin watch pushed through to Strava without issue, but my bike ride from my Garmin computer (Edge 1000) pushed to GC fine, but not to Strava.

I disconnected and reconnected the pairing between Strava and Garmin, but still no joy.

Any advice please?

Can I manually push the activity from GC to Strava (either via Web or on the App)?