In my opinion without Internet using crypto, making a transaction is impossible. Because crypto is a virtual thing and there is no physical existence of crypto. So it is impossible to use blockchain without internet.
something that is very impossible to do and you are absolutely right, that until now there has not been found a way how to do anything in crypto without using the internet network? very unlikely to be done because crypto is very closely related to the network, which obviously requires the help of the internet to carry out all forms of transactions.
would it be possible? The answer, of course, is that at this time, it must be answered that it clearly can't and must help from the internet. but in its development there will be changes is another matter, because it has not and is not possible if asked at this time. hard to think without the help of the internet!!!