Experiment with loading additional customer data through knockout.

Chrome Knockoutjs context debugger is useful

https://chrome.google.com/webstore/detail/knockoutjs-context-debugg/oddcpmchholgcjgjdnfjmildmlielhof?hl=en

composer require dominicwatts/customerlogin

php bin/magento setup:upgrade

Go here

/xigen_customerlogin

Customer CustomerData pulled through via knockout

Chrome DevTools inspecting localstorage

All done via Plugin