There is no way to access external (REST) APIs on Bedrock platforms that do not support BDS (Xbox, PS5, Switch, etc.)

Steps to reproduce the issue:

1. Create addon with a script using @minecraft/server-net

2. Add the addon to a world on a Realm on Windows

3. Join the Realm using PS5/Xbox/Switch/etc.

Expected result: You are able to use @minecraft/server-net on Realms
Actual result: Using APIs from @minecraft/server-net fails on Realms