I have an EdgeRouter-X and a UAP-AC-LITE, it's been a few months since I've been struggling with a problem with the PoE of the ER-X, it randomly disconnects the AC and the only solution was to separately connect the ER-X and the UAP each one with a power source. They are expensive equipment just for a home network to give such a problem.
I've never used Mikrotik products, I saw several videos about it and I'm seriously thinking about migrating to Mikrotik.

The Mikrotik Hex S seems to be the best experience, I would connect with the power source and take advantage of PoE to turn on the AP.
I imagine that the UAP-AC-LITE will not have problems with Mikrotik, but would be willing to exchange it for another solution from Mikrotik itself, what do you recommend?

The EdgeRouter X is passive PoE only as well.

The hEX PoE does 802.3af/at if you add an aftermarket 48V PSU such as Mikrotik's own 48POW or the PoE Texas PS-48v60w.

What would be the recommendation of Mikrotik products to ERX and UAP?

I'd say your original choice of the hEX S is a fine match to the ER-X, from use of both, but it has your same complaint, being passive PoE only, which is why I recommended the hEX PoE instead. If you study their differences, you'll find that the PoE model isn't a pure upgrade from the hEX S:

• 92-rule table in the hEX PoE but not in the hEX S
• microSD storage slot on the hEX S, none on the PoE models
• 2-4× CPU power on the hEX S, useful if you aren't using it mainly as a smart switch
• better PoE support on the hEX PoE. 4 ports of output versus one, more current output per port, and 802.3af/at versus passive PoE.

If you need active PoE or multiple PoE outputs, there's your choice made.

As for the WiFi bit, I know nothing of MT's wireless solutions. However, why would you need to replace both? As I understand it, the source of your problem is the power source. Keep the Ubiquiti WiFi gear if it's working for you.

I only need one PoE port for the AP, that's why I thought Hex S, it's a complete and robust solution to know Mikrotik solutions and would totally replace ER-X.

Changing the AP would be just out of curiosity for equipment from other brands, I even saw a TP-Link EAP255 that is more powerful and has the same price as the UAP Lite.

Thank you all.

The PoE-Out section of the docs may be of use.