Home court is usually worth about 3-4 points over a neutral court. Let’s use 4.
So if Georgia and Tennessee are even, it would be a pickem on a neutral court. Georgia 4 point favorites at home. Georgia 4 point underdogs on the road.
If Indiana is a 5 point underdog to Tennessee on a neutral court, they’d be a 9 point underdog on the road and 1 point underdog at home.
Without crowds That 3-4 point home over neutral advantage probably drops to 1-2. There is still an advantage of familiar rims, sight lines, locker rooms, routine, etc. I’m not sure if something is tracking this, it’d just be my guess.
So now Tennessee and Georgia are even, Tennessee is a 2 point favorite at home and 2 point underdog on the road.
Huge caveats apply, but this is the basic principle.