Got it. That’s actually easier.
Here is the theory so you understand what this is doing. You might want to install this in stages so you can test as you go.
1 - Starting with the switch box that is fed from the panel, you will wire the Inovelli and the first light as a simple 2-way. The only thing that is a little different is that you are also going to send a constant hot to the first light box.
2 - At the first light box you have two 2-wire Romex that goes to the other light. So you will use the black and the white of one of those Romex to send the switched hot and neutral to the other light.
3 - At the first light box you also have to send a constant hot to the second light, because you ultimately want to get it to the other Inovelli. You will use the black conductor from the SECOND 2-wire Romex to do that. Cap off the white from that Romex as it’s not needed.
4 - At the second light box, figure out which Romex has the SWITCHED hot and neutral. You’ll connect those to the 2nd light. You’ll also connect the white conductor of the 3-wire going to the other Inovelli, sending a neutral to the other switch.
5 - At the second light box, connect the black from the SECOND Romex (that has the constant hot, but no neutral) and connect it to black conductor of the 3-wire. Cap off the white from the SECOND 2-wire and the red from the 3-wire as they’re not needed.
6 - You have now sent a constant hot and a neutral to the other Inovelli box, which is all you need to power the switch.
@harjms please review