You have to flash an extra file if you need the proprietary Google Play Services, at default LineageOS is just stock android without it. MicroG is is indeed an open source reimplementation of GPS, so it spoofs your device as it has the real GPS installed.
Also it uses other (local) database of network locations (UnifiedNlp) so when using a maps app it will find your location faster and more accurate than only relying on gps (the positioning system, not Google Play Service) ;)
In my opinion I feel like /e/OS is too bloated and I don't like the iOS inspired theme. If you prefer stock android you should choose LineageOS. BTW there is also a fork of LineageOS called LineageOS for microG, should you need Play Services.
As far as I know you can't, but what I did was to connect the drive to a PC (Windows or Linux) and make a SMB share of it. There is an app on F-Droid that can connect to SMB shares.
Take out the hard drive out of your laptop and put the drive for the server in it, install Debian using the built in monitor and keyboard of your laptop.
I use this all the time, also nice for text share.
And recently Llama3 and Mixtral!
It's part 1, maybe they will mention it in one of there next episodes.
I've a Dreame L10s Ultra flashed with it, very happy with my purchase. A bit scary to install everything but if you read the instructions before doing it you should be fine :)
I use SplittyPie allot with my friends if we go on a trip/do something together. Works really well. You can install it as a PWA and it's FOSS ;)
https://lemmy.ml/comment/7407133