I know what you mean.
I had put wheels and tires on my '19. Kept the original wheels and tires in my garage. Traded the '19 on a '21 a couple of weeks ago. I swapped the wheels/tires before the trade, so the originals were back on the truck I traded in.
Now I have my "good" wheels and tires in my garage and have been having the same thoughts about the tires on my new truck.
With my '19, I drove the stock wheels and tires until they basically needed to be replaced. Then I bought new wheels and tires to go on.
The problem I discovered with that plan is that when I traded the truck in, I had to take a bit of a hit on the trade value because it needed new tires. This time, I'm going to take the stock wheels and tires off while they still have enough tread to say "the tires are good. It does not need new ones" when I eventually trade it in.
Side note: My stock wheels were/are 22". Tires for 22" wheels are a fair bit more expensive than 20" tires. When I bought mine, it was not THAT much more money to buy 20" wheels and tires than to just buy 22" tires to go on the stock wheels. After 2 or 3 tires changes, the 20" wheels will have paid for themselves.