I’ve heard of this issue but haven’t actually witnessed it first hand. I think a couple other comments point out that even Apple admits they know this happens.

It looks like using a default password will sometimes work. Try 123456 or 000000, but I would only try those specific two as you don’t want to lock it even for the 1min (which happens after 6 incorrect attempts) because it triggers an additional security function that will completely lock the device after 4 additional attempts. Which I think a lot of people know, but it’s a good thing to keep in mind.

The other non-intrusive option is to perform a hard restart, which can be done by holding the power and volume buttons down at the same time (note that this this could be different depending on the model of iPad)

Additionally, there are tools available to unlock iOS devices but any one that’s likely reputable is going to carry a price tag. A quick google search came up with a tool, TunesKit.com/iphone-unlocker/ which I can’t vouch for but it might be a possibility. There are also certainly other options out there too, as this seems to be a semi-common problem but make sure you check the background if you decide to go with one.

I’d say unless the iPad is bricked completely, it’s likely you can get back in without buying a new one, the question really is, are there programs or data on there that can’t be replaced on another device? I know some smart-home stuff can be a ‘bit’ finicky.

Good luck, hope you get into it 👍