Triathlon/multisport garmin timing error, cannot reupload to Strava

I did a triathlon race on the weekend, swim leg was cancelled and we did a beach run, bike, run.

Due to this and my personal errors using my Garmin the timing was off on all activity legs. This uploaded to strava with these errors. I deleted these activities from Strava hoping to adjust the times on Garmin Connect and then reupload onto Strava. I successfully changed the times on Garmin Connect.

I can't seem to reupload a multisport activity to Strava, even doing it manually through exporting the file. When i go to export the file the only export option does it as a .zip which cannot be put into Strava.

Has anyone had similar issues or knows a way around this?

thanks!