I highly doubt that. Darkseid at full power was implied to have lost to the Justice League. What about that screams effortlessly soloing Thanos who's now at a level where he doesn't even make sense? Apparently he beats everyone now and that's just a Universal constant.
Tarene at full powe is implied to be on par with Odin or thereabouts and Odin might not be all powerful under Aaron but he'd still shit on Zeus' soul at the time.
Nowhere was it ever stated, or implied or alluded to that DS was at full power, or for that matter even there for it was only an avatar of himself. Darkseid stated it was not part of his plan to fight the JL at that moment, and as shown in his recent fight with Zeus, if DS is serious about killing a Skyfather with universal feats he can do it effortlessly.
However, what was stated directly on panel was that DS has never in his full form or power ever been present or interacted with any of the Justice League of 3rd dimension inhabitants. Furthermore, that goes for any of the true new gods including highfather, and orion as well.
At this very moment Darkseid is extremely powerful, but he has the power of the Olympian Pantheon. This like I said is extremely powerful, but you're taking it to places that were never mentioned in the book that just came out. Darkseid has the power of an entire Pantheon. He is not megaversal.
Maybe Thanos in the 90's without the IG, but Thanos under Donny Cates is another thing entirely. we have to find out what level of power Thanos is on at this time. It was said that he would be written a couple tiers above Odin or Zeus in the future, which was written a couple of years past. That future may be right now, due to his run in with the God Quarry. We really need to wait. if Thane had the power of a true Phoenix Avatar which had the ability to effortlessly consume entire stars, and Thanos was able to evenly contend with him, I have strong doubts that the JL was or is on his level.
Like I said, give it some time. No point in making a judgement at this point. We do know that he was able to contend with a Phoenix Avatar evenly. That makes him a high Cosmic power at the very least. It would also place him above the likes of Zeus, or Odin if we were to measure an average Galactus to a Phoenix avatar. Best to stay tuned IMO.