I can guess that you have SPI displays from the 7-pin headers.
I can guess that you have a Teensy 4.1 from the pcb layout.
I can guess that your constructors might be :
U8G2_SH1122_256X64_1_4W_HW_SPI(rotation, cs, dc [, reset]) [page buffer, size = 256 bytes]
But I would be much happier if you had answered my questions properly.
If you are using a Teensy 4.1 there will be plenty of SRAM.
External pullups are not necessary but would be wise. If we could identify your hardware display(s) we could see if they are already mounted.
It would have cost 5 minutes from your life to paste a link to the display, quote "Teensy 4.1" and copy-paste your 8 constructor statements.
David.