Hi Charlie
It is pretty damn poor the Lexus Portal, I am in conversation with Lexus UK to try and sort this matter out. If you look at this app, especially the reviews, this is what we get in the UK. https://play.google.com/store/apps/details?id=app.mylexus.lexus.com.mylexus&gl=GB
In America they have the Lexus Enform Infotainment and if you google it you will see the difference against what we have here in the UK but hey ho we are always the poor relation in the UK.
Just a suggestion, have you had a word with Lexus UK Technical?