You are repowering from Yamaha to Suzuki.
The Zuke gauges are really well thought out stand alone gauges (once you learn all the menus)
There is no need to use a Garmin or other MFD for most Engine data.
The Garmin is a great way to display Range and remaining fuel, if you connect the tanks correctly to your Zuke gauges.
You have a small Garmin ..7" or 9"? In dash or on a mount? Which model?
Different models have different capabilities. There is a lot to unpack and consider.
Think about redoing your dash...moving gauges up...make a flat panel...
Now is the time to update the look of your dash. The trend is BIGGER and flat Touch screen and its a good trend...don't fight it...
You can get some ideas here
https://www.greatgrady.com/threads/265-x-flat-panel-dash.31837/
or search "dash" for other posts