i tried for 5 months to get 7 or 8.1 working, it is blocked hardware side from intel and forced driver incompatibility. save a lot of time and read my posts regarding win 7
Please keep in mind that the Apollo lake is build for win 10 only.
Even in my Bios is a win 7 OS option it is not possible.
The intel hardware has some build in nasty surprises what you can counter by external usb devices (wifi, bt, soud, touchpad/mouse etc.
BUT your main problem is the Graphics driver
Do it like I did, prevent windows from updating anything, then rip out everything what bugs you and put a win7 OS look and feel over it. This way you have a modern OS working under the hood with win7 handling, no spying, no telemetry and I never saw even a single advertising or had a single crash because of unwanted remote installation.
I tried all the other ways, for the Apollo lake this is the best workable for me, since I am back in control ans not MS. (see link below)
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1981 soldered my first Sinclair computer 1K, tapedeck * 1984 build and sold IBM clones 8Mhz, 512K, 20MB HDD * 2018 messing with ultrabooks