Very wise on your part to catch any seepage. If this transfer case is anything like the one on my 2019 Nissan Pathfinder, they only hold a few ounces of gear oil. The slightest seal leak and you're toast.
Yeah I check everything out a few times monthly... fluids, adjust tire psi depending on drastic weather changes, crawl under the car and look for leaks, unusual tire wear, etc. It's hard for me to really consider it much of a leak as it hasn't even left a drop on the garage floor. Might have leaked a bit in transit, but minimal I imagine. I happened to see a drop (literally just 1 drop) hanging from the transfer housing, wiped it off and saw 1 more drop 3-4 weeks later. Of course leaks almost always get worse and it's still under warranty for that so might as well get it taken care of. When they had it for the fluid exchanges and confirmed my mention of that leak I hope they at least topped it off knowing I'd be back soon for the fix, which is actually this coming Monday. I will say it 'looks' to be a decent sized case for what it is, but of course I have no real idea as to how much capacity it has.
Having said all I have I will honestly say I do appreciate the thorough attention the car gets when there even for just an oil change. They do a checklist and supposedly check the car end/end and give a green for good, yellow for future attention or red as in GSD ASAP. There is a window in the waiting area showing the entire service dept and they do appear to check what they claim.