I don't see this happening. Even with iPhones, which ship 100M+ units a year, Apple sources panels from Samsung and other industry suppliers that generally use very similar tooling for other handset manufacturers that also source OLED screens for their phones. There are economics of scale across the supply chain itself, even if Apple sources the best variant of the OLED panel. Or what was Samsung's best OLED mobile phone panel, last year
The same is not true for micro-LED - it's inferior to OLED, there is no significant adoption in the supply chain outside of a very niche group of chinese TV manufacturers and high end Samsung TVs (which nobody buys).
Apple is going OLED across the board (*edit - expanding to the Macbook Pro / iPad Pro panels, which will have better display characteristics than the consumer OLED panels (which will come later) on non-Pro iPads/Macbook Air). The mini/micro LED experiment hasn't really gone anywhere and is being dropped.