You want 2-3 phones instead of a folding phone. Light pocketable phone for actual mobile purposes. Can get a data only esim phone with voip to supplement voice/text phone, and have independent enabled data. independent charging. Backup when broken/lost phone. I suggest:
1-2 lightweight phones for mobility.
1 large possibly rugged phone for video or rugged adventures. Can be steam deck on a stand that is better setup as a dashboard. email + web tickers/discord. samsung and other phones also have a "desktop multiwindow mode"
3rd phones, can help with having 2 separate phones act as bluetooth keyboard and trackpad. Keep banking/secret stuff seperate/more secure during travel. Keep one in a locked tilt/swivel stand near bed most of the time. mod to alternate os.
2 or 3 phones is much more storage/ram and audio quality than including a tablet, with better portability options in both packing and daily use. It's also much less $, and can leapfrog upgrades.