Check available networks for remote mode

### What is this about?

- We should check if the current network is 7702 supported.
- useRemoteMode already has a logic that checks that

### Scenario

_No response_

### Design

_No response_

### Technical Details

_No response_

### Threat Modeling Framework

_No response_

### Acceptance Criteria

_No response_

### Stakeholder review needed before the work gets merged

- [ ] Engineering (needed in most cases)
- [ ] Design
- [ ] Product
- [ ] QA (automation tests are required to pass before merging PRs but not all changes are covered by automation tests - please review if QA is needed beyond automation tests)
- [ ] Security
- [ ] Legal
- [ ] Marketing
- [ ] Management (please specify)
- [ ] Other (please specify)

### References

_No response_

Start by locating useRemoteMode and inspect its existing check for whether the current network supports 7702. Trace where remote mode is entered and determine where the same network check should apply. Done means remote mode checks the current network for 7702 support consistently; no test or file path is specified in the issue.

Written by the indexing model from the issue text.