If it is an HDMI screen, then you can put into the bootloader configuration HDMI_DELAY=8 or a different number than 8, which you may have to try out.
This example begins the output of the HDMI video signal 8 seconds after the start/restart of the Pi, which then is realtime and not delayed.
See documentation here https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#HDMI_DELAY
And how to mod the eeprom bootloader config:
Does this "fake numa trick" work on Zynthian? - #5 by fussl