You can now have a different name, profile picture, location etc. on Intervals.icu. Previously these were always in sync with Strava. There is a now a separate setting for weight units … so you can use pounds and kilometres or kilograms and miles if you like.
That should still work fine. Nothing changed there. However I see you have enabled download of weight data from Garmin Connect. If Garmin send any weight data it will overwrite data from Strava.