You need to embrace CarPlay and Google Maps and move on.
Yeah, I get the HUD is a fun toy but the reality is that it forces you into an archaic navigation system that behaves more like 2004 than 2024. And in the end it's about being sent on the right route, it's far more important than having two or three different screens telling you the same information.
HUD in and of itself is pointless today, it was designed for a window in time when in-car LCD screens were tiny. iDrive 8 screens are gigantic, iDrive 7 plenty spacious to see all the information clearly and easily. Use your HUD for speed and changing radio stations, it's good for that. Let the big screen handle the navigation.
And you get major pluses from Google Maps (or Apple or Waze if you prefer) that BMW simply cannot match because they don't have the crowdsourced information that these massive platforms have. And the biggest feature of all IMO is Google's ability to show you what happens if you choose a different route in real time, right on the screen, little speech bubble, you don't have to tap a button or take your eyes off the road.
CarPlay itself is brilliant because of the multi-window display that shows your media controls and album art at the same time as the nav, and of course there's Siri for map commands (yes, even using Google Maps or any other third-party app), Apple Music, sports scores, texts, etc.