Pixel 6: how to flash Sailfish/Ubuntu without a desktop (just unlocked bootloader + On-the-Go flash)?

Ubuntu Touch (alternative to Sailfish): https://devices.ubuntu-touch.io/ Sailfish: https://docs.sailfishos.org/Reference/Android_Compatibility/#hardware-support Definition/instructions of flash: https://phone.docs.ubuntu.com/en/devices/installing-ubuntu-for-devices ; Must switch to Sailfish or Ubuntu to have the normal cursor? Do not wish to purchase a desktop just to flash (can not afford a room; would not have purpose for a smartphone if could afford a desktop + a room.) Most compute devices allow to install (flash) new operating systems from flash (Universal Serial Bus) storage; how to do this on phones? Does this require an "On-the-Go" Universal Serial Bus device which includes a small Linux (to execute ADB/fastboot)? Do such On-The-Go devices exist, so do not have to purchase a whole laptop just to flash phone? Assistant suggests that such exist: https://poe.com/s/bthVjSoU5cwoE7azr2rg (just purchase such On-the-Go device which has the Sailfish/Ubuntu flash imagee, reboot your phone to the bootloader menu, use menu to load Ubuntu from flash)... can do this?