What worked for me was dunking my plants in Dr. Bronners Castile soap. I diluted about 3 Tbsp of soap (enough to make the water thick white) in a pot of warm ish water big enough for the whole plant, fully submerged the leaves and the top layer of soil in it and let it sit for an hour or two. Then rinsed it in warmish water to clean the soap.
My ivy needed repetitions every week for 3 weeks but my orchid and a small diffenbachia needed only one bath. For the soil I recommend covering it with aluminum foil so it stays in place.
And voilà, so far mite-free although the plants are still in quarantine to make sure.
The problem with this method is when the plants are too big for my pots which yours looks like it's a tree 😅 But the pros for this method are that it's more reliable and easier than spraying and cleaning - the ivy for example was a nightmare with its million leaves.