Possible to know whether Kindle (Oasis/Paperwhite) is jailbreakable before buying?

Hello.

Sorry for making a thread about this but I tried searching and couldn't find and I am at my wit's end.

I am looking to buy a Kindle Oasis or Paperwhite but I have no idea about what model number or firmware it is going to have by looking at the Amazon page. For example, the product is called "All-New Kindle Oasis (10th Gen)". Any idea if I can know beforehand whether the device is possible to jailbreak without buying it first?

I would have preferred to buy a Kobo but they are not available here in India. If anyone wants to suggest any non-Kindle ebook readers that are compatible with Koreader I would appreciate that as well.

Thanks.