Tokens can not be issued if the required facilities are not built for them. You can keep track of progress in PODs construction here: https://giga-watt.com/promo/timeline.

PODs 3-5 are for batch 3 tokens, next 6 Pods are for batch 4 tokens.

Mining equipment also has batches, but they don't correlate with token batches. There are only 4 token batches. Three of them are already issued. "Non-issued" means that the pods aren't built yet, therefore users with non-issued tokens can't use them, rent them out or sell them. If tokens are issued, it means that they can be transferred or rented out.