Maybe provide some background information as a basis for the advice you seek..
What model of RPi board?
What Operating System have you installed? And did you use the NOOBS or PINN installers, or a simple Operating System image?
Is there anything else unusual or customised about your system?
Because the usual expectation would be that a rebooted system would start with all the correctly configured services with no need for user intervention. Is the SSH Daemon configured to be enabled at reboot, for example by using the raspi-config utility?
Raspberry Pi Foundation documentation - https://www.raspberrypi.org/documentati ... /README.md