On XMA you have at least theme like memory-home-family-nature tied up together. The repress memory theme drive you to the unlishing power theme, the respinsabilty of creative/destructive power, it is a journey, accepting your dark side (Charle's mainly), letting go of control over woman and the fear of your dormant super power.
Now most of it is pretty straight forward in the surface but it is inherent to the characters and how they act, they form a whole. Wich is another point of the movie. Charles will blurr the frontiere beetwen his head, heart and home/family/mansion.
You have symbolizm with the tree/forest and the birds. It is also the reason of Alkali Lake. Logan represent the animal side, with no control. When Jean heal him by giving him some happy memory it is pretty deep.
First because it is what Charles will get to do in the end, if he had not hide Moira memory Apocalypse woulf never have come. (Plus Moira and Jean both interract with Apoc with fire).
Second because in every movie Logan end up stabbing woman in the stomach, and there he put out needles of his heart and stomach. No stabbing, improvement on different timeline.
Tere is analogy beetwen Erik and Charles, the first told everything to his wife where Charles kept everything hidden from Moira, Erik daughter can summon birds and Jean his a bird figure. In Jean's room when she has a nightmare we can see a picture above her bed of a tree burning (link this to scott and represent memory), mens with arrows and bird of papers. Next scene you have the daughter of erik summoning bird in the forest (treeeees!) and being killed by an arrow.
In Auschwitz to reveal Magneto power Apocalypse will speak of a forest he will birn to the ground. This work with Erik because the forest is a place of tragic memory and as usual he wippe out the bzd memories. In the opposite Charles accept the bad memory he do not get mzd when Scott destroy he family tree. He is compassionate and end up like a buddha. Bald and connected to the world around him.
Connectivness the super ego of Apocalypse wanted, despite him believing being a god he lack connectivity to others. Pretty human.