Thank you for the feedback. The product team has noted this suggestion and will consider it if resourcing allows.
We’ve moved this ask to the backlog due to technical challenges in reserving Public IP addresses during stop state.Gert Humphris commented
We also have this requirement. Want to build a big network with lots of VPN Gateways but if we cannot turn them off when not in use the cost is going to be too much to make it a viable project.