"I can put hole above leds, but routing (auto) fails..." That might just be because your layout is too constricted. Your project is private so only you can see it to comment on. Please read: [https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a](https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a)<br> <br> then post back with more information. "i'm unsure how to correctly specify pads." Read the linked documents in the above forum topic. Thanks.

@andyfierman thank you for your answer. I did not find (or i'm bad at metionning) if there is a special process with reverse SMT. My question is more "how to correctly define  reverse SMT led in PCB layout". As i'm a basic user, i fear it is too complex for my experience :)

One thing is i can't find reverse SMT leds on LCSC so i was wondering if it was problematic

There are a few reverse leds on LCSC but if you want them assembled for you, you need to search the JLCPCB library because stocks at LCSC and JLCPCB are separate. You can search and if necessary, edit or create and save a suitable Footprint and then do the same for the led symbol (making sure you have the correct supplier and manufacturer information and numbers assigned to it) and then assign your Footprint to it . When you convert your Schematic to PCB  the correct Footprints will then automatically be pulled into the PCB. Please study the main Tutorial and (2 2) and (2.3) in the link I gave you. It will save you a great deal of time and pain. :)