In the app, on the home screen, the available Cobee accounts are displayed, i.e. the sources from which the balance you have available for consumption comes from.
The meal wallet refers to the balance you have accumulated in previous months in the transport benefit.
This balance, which has no expiry date, will be available on your card until you use it. You must use it in the transport benefit, as this is where the accumulation comes from, and it is not possible to use this money in any other benefit.
If you want to check how the balance accumulation works, you can do it from this article.