Open water swimming... average pace

had a Garmin 735 and had it set up to give me an average pace every 100 meters in the open water. I now have a Fenix 6 and all it does is vibrate every 100 meters. It doesn't give me an average pace for that distance. It's not worth having an alarm if it doesn't give me what I'd like. Is there any way I can add the average pace to show every 100 meters too? I've been looking at different things on the watch and can't find anything