Sharing semantic model to other workspaces

Using a group may be easier to manage access on your semantic model.  You would then grant the group Read and Build permissions on the model.  You do not need to grant them access to your workspace.

Using an Azure AD security group is a best practice. It simplifies access management and scales better than individual permissions.

Once you're on Microsoft Fabric, the sharing model becomes even more flexible, Semantic models can be created and edited directly in the web or Power BI Desktop using TMDL and they can be reused across Fabric workloads (notebooks, pipelines) via Semantic Link