Reporting
We're not sure if the seeds

We're not sure if the seeds will be viable. You should do a germination test and see how it goes.
As you've discovered, the pods should ripen on the plants until they’re dry and starting to turn brown, with the seeds rattling inside. This may be as long as a month after you would normally harvest the peas or beans to eat. You can even leave the seeds in the pods until planting time.