I'm trying to create a 1.16.1 adventure map which includes an Ender Dragon boss fight. I've figured out how to summon a dragon in the Overworld that isn't passive, but the problem is that the dragon's perch (which in a normal fight is above the portal, and is the center point for its circling and attack patterns) is at (0,0), which isn't where the boss fight is supposed to take place. I've looked around for a way to tweak the perch point, but I haven't been able to find any way to do it using command blocks or commands. I don't want to get into modding or data packs if possible, as I have effectively no knowledge of how to create them. If it's not possible, I'm capable of substituting a different boss for the fight, but if it's possible to use an Ender Dragon given these circumstances I'd prefer to incorporate it.
Is it possible to shift the "perch" for an Ender Dragon spawned with the /summon command away from (0,0) using command blocks? If so, how is this done?