SPFx Web Part Not Visible for External User in Client Tenant

Hi everyone,

One of our team members has developed an SPFx web part that we have deployed and published in our client's SharePoint tenant using a service account.

The web part is working as expected when we access the client tenant using the service account. However, when I access the same client tenant using my external/guest user account, I cannot see or use the SPFx web part.

Current setup:

The SPFx web part was developed by one of our team members.

The solution has been deployed and published in the client's SharePoint tenant using a service account.

The service account can see and use the web part successfully.

My account has also been added to the client tenant as an external/guest user.

However, when I access the same SharePoint site using my external account, the SPFx web part is not visible/available.

I would like to understand whether this is expected behavior for SPFx web parts when accessed by external/guest users, or if we are missing some configuration.

Could this be related to SharePoint permissions, Entra ID guest-user settings, the App Catalog, API permissions, or the SPFx solution deployment configuration?

Are there any specific permissions or tenant-level settings that we should check to allow external users to access the SPFx web part?

Is there any Microsoft-side restriction that prevents external/guest users from accessing SPFx web parts?

Any guidance on what could be causing this issue and how we can troubleshoot or resolve it would be greatly appreciated.

Thanks in advance!