My brother was a mechanic, he stated he would be leery of driving on old tires even if they look good because tires start deteriorating after 8 years and you can't see the deterioration till you start driving down the road and the tread starts breaking off or worse, you have a blow out.

Deterioration is worse if you leave your car sitting out in the sun, you should always put covers on car tires if the car is sitting for long times in the sun without being used much.

This isn't quite the same but in high school I used to work at a dry cleaners and I was required to let customers who brought in curtains to be dry cleaned, that if they hadn't been cleaned yearly that there was a very good probability that their curtains would fall apart during the dry cleaning due to sun damage that can't be seen. I saw that happen a few times, where the curtains came in looking perfect and as soon as they came out of the dry cleaner, they would be in shreds. Sun can do a lot of damage to everything.

Here's what google says about 10 year old tires on cars that aren't driven much-

Are 10 year old tires safe to drive on?
As they age, the rubber compounds deteriorate, causing them to be more prone to failure. As such, it is strongly recommended that vehicle owners replace tires that are over six years old and refrain from using aged tires, even if the tread depth appears to be optimal.
May 31, 2023

Do tires dry rot in garage?
Leaving your car parked and inactive in one place for too long can be hard on your tires and quickly lead to dry rot. Whether your car is a vintage classic that you keep in the garage for months at a time or one you've bought for someone who will soon have a license, there are steps you can take to prevent dry rot.
Mar 30, 2023