https://wiki.mikrotik.com/wiki/Manual:Interface/PWR_Line
Supported Hardware
The device is fully compatible with our PWR-LINE AP and the newest revisions of products that have a microUSB port, such as- hAP lite, hAP lite tower, hAP mini, mAP and mAP lite have pwr-line interface
As the LTAP Mini can be powered via MicroUSB and has the same cpu architecture as the mAP I cannot see a reason it does not:
https://mikrotik.com/products/compare/RBmAP2nD+RB912R-2nD-LTm
