They can't warranty an engine that they don't buy themselves which is why they won't let you bring one to them. Everything in the car business is in short supply right now. I've been working in this industry for almost a decade and I've never seen it like this before. Best advice is to find another car that you like and go with that instead. It will be much quicker than waiting for a replacement engine.
How fast were you revving that engine when it let go? A Honda engine with 60k on it shouldn't come apart like that unless it was low on oil or someone was really running it hard when it was cold. Was it a manual transmission?
I can't get a ring and pinion for a F150, it's backordered, then when the parts come in, I have to wait in line while the shop plays catch up. Looking at 2 months to get back on the road.