One of my keys has been missing since before the pandemic. I asked DH to replace it for my birthday. He is a smart, fix-it kind of dude. He ordered the blank and tried, tried, tried to program it. After much angst, many YT Videos and lots of research via Sir Google, he started looking at other options and making phone calls. Our local Ace says yeah, they do it, quoted DH a price, when to bring it in, who to ask for, blah x 3. We get there and said dude says, "Yeah, we only program the ones you buy from us." Fuck! We finally caved and took it to the locksmith down the street. $200 bucks later, the birthday gift was in working order. Let's hope the "lost" one doesn't turn up too soon.
And my Toyota has a push button starter and keyless entry, which apparently is a complicating factor.
We bought a Sprinter based RV last year and OMG everything is insanely complicated and parts are ridiculously expensive. Makes the Toyota key adventure look like a free walk in the park.
ETA 4/11/22: I found the key fob wedged between the leg of the bed and the wall. Absolutely invisible. I just stuck my hand down there to snake a cord behind the bed. Whomp, whomp.