With blazor WASM, if you have performance issues with a large number of clients, it’s not the blazor app, but the webapi server it’s calling. Early token expiration sounds like a server recycle, but you should track down the issue.
if you mean large payloads effect the blazor app, then you need some form of paging and better management of state.
the browser networking stats should show if its server latency or the blazor app that reduces performance.