### Check for existing issues

- [x] I have searched the existing issues and checked that my issue is not a duplicate.

### What happened?

In a setup where, in the model list, certain models are on an `access_group` , when a team has scope to access such model group, the model list UI does not show them as available models even though they are accessible programmatically.

### Steps to Reproduce

Configuration:

``` proxy_config: model_list: - model_name: gemma3-4b litellm_params: ... model_info: ... access_groups: ["on-prem"] ... - model_name: qwen3-embedding-8b litellm_params: ... model_info: ... access_groups: ["on-prem"] ... ```

Then a team with access to such model group:

<img width="1295" height="356" alt="Image" src="https://github.com/user-attachments/assets/7ed5dfea-faa6-474c-9f50-2f6a0b14d36c" />

when a user on that team checks the Models+Endpoints ui, even if selecting its current team, nothing shows in the models list

<img width="1602" height="747" alt="Image" src="https://github.com/user-attachments/assets/430f9b09-6128-4b0c-a9ea-076215d4606e" />

### Relevant log …