I have not been able to verify the arrival of Syrian fighters from the Turkish-backed factions (SNA) in Azerbaijan as of now. I can confirm that dozens of fighters from NW Syria (outside of regime control) left Syria via Turkey in an unknown direction about a week ago.

Families lost touch with these men since their departure. Rumored destinations include Azerbaijan, Qatar, Turkey and Libya. I am in touch with families & friends of men who left and will report once they manage to get in touch with their loved-ones.

About a month ago, rumors spread on WhatsApp among SNA fighters that they can register to go to Azerbaijan. Many registered over WhatsApp, others apparently thru offices in the Turkish-controlled areas.
The fighters registered due to the enticing rumored salaries of $2K-$2.5K

The SNA mercenaries who've gone to fight in Libya against Haftar were recruited with direct involvement by Turkish officers who met with commanders of the SNA factions to pressure them to send fighters. With the alleged Azerbaijan recruitment, there haven't been such meetings.

It seems likely that the recruitment is being carried out by a Turkish private security company that is also involved in shipping Syrians to fight in Libya. There is no need to apply pressure on Syrians to leave anymore. The number of men wanting to go far exceeds demand.

With time, the idea of being deployed oversees as a mercenary is becoming more socially acceptable in Syria, in both communities residing outside of regime control (men in Idlib have registered to go to Azerbaijan too) and in regime areas (where men are going to fight for Haftar)

Syrian lives are regarded as expendable, with Syria serving as an arena to settle geostrategic scores at Syrians' expense. Syrians resisted & still resist this logic, but the collapse of the economy is prompting many Syrians to be willing to sell themselves to the highest bidder