I'm on PlayStation so I can make a world in legacy and then covert it. I did that and then went to the end to respawn the ender dragon.

While the beams were bringing the regen crystals back on the towers, and enderman killed me by surprise and I respawn in the overworld, go back to the stronghold and go to the end. After I got back to the end, the central portal was deactivated.

No portal blocks in it and I tried respawning it again to see if the portal would reactivate but nothing happened in the crystals were just sitting on the central portal doing nothing.

This is a photo of me 10 or so sec after placing the crystals from my failed attempt of respawning an ender dragon. (Remember I created the world in legacy then beat that and converted it to bedrock straight to 1.20.51and died while it was in the middle of respawning and the portal remained inactive.