Undo Minecraft Dead?

I'm in Minecraft at Lvl. 70 died and the game only wants to play 7 levels, is there a way to do something in the game files?

I play single player without cheats.

If you want to continue playing without cheats, you won't be able to change anything.
Why do you save 70 levels instead of displaying them beforehand?

You can do a lot with programs like NBTExplorer - as long as you have access to the world and use the Java Edition

I haven't used it yet, so I preferred to keep it for important things.

Do you play completely without mods? Otherwise there are various mods that offer e.g. An XP tank or similar.

Yup, in the world I always play without mods… Well, that can't be changed, then I'll just defeat the Ender kite again xD

Hacking doesn't help you because of the xp but Sigma 5 is good, but not hacking on servers!

You won't get another 60 levels then

No, unfortunately not, someone came up with the cool idea, no matter how much XP you had, to only give back a maximum of 7 after the death.

I mean the ender dragon doesn't give you another 60 levels if you kill him again but only 1 level or so