As long as you have paid for your annual "software development licence" from the government, and they haven't revoked it after finding you breaking "best practices" like producing or using encryption software without a government backdoor.

We are talking about the future here. Restrictions on our freedom will be added until it is no longer profitable or until people start to protest. And so far it has been immensely profitable and among the general public basically nobody complains, so more restrictions will likely continue to be added for a really long time.

There are subscription-only development studios and toolchains. (Always have been, really.)

If there is a new platform where this is the only kind of thing we can run on a walled garden device, then I'm not sure quite how general purpose you could call such a device.

If your FOSS-developed app wants to open a network socket to an IP address that isn't on the government whitelist, then the OS will perform an OSCP check to ensure the (hash of the) binary has been recorded, along with the identity of its developer, in a corporate or government-run database.