In the bible he shows up plenty of times throughout the centuries. If he's talking through burning bushes, killing all the first borns, flooding the planet, getting people lost for 40 years, making laws imprint themselves on stone, sending his son who is also him on a suicide mission ect.
Saints who claimed to have killed dragons, brought chopped up people back to life and survived deception have said they've seen him all throughout the middle age.
The homeless druggy on the street across from me claims to have seen him.
If he reveals himself to thousands of people why not jump the gap and reveal himself to everyone?
Don't argue 'because if u saw him u won't need faith' That didn't stop him in the bible and won't stop him now