Question [Q] Am I able to push install files to SDcard on unbootable Android

HI
I have unloked bootloader with TWRP recovery available
In case I render my Android some way unbootable and zips for OS reinstall are deleted from SD card on condition the phone isn't hard brickwalled and I can boot to recovery,
Am I able to push essential install files to SD root folder some way (via flash mode, fasboot mode,from recovery?)
Ta