Sensorless for non salient motor

Hello!

I just found the SimpleFOC project and it is amazing. I wish I had found before !

I have a sensorless PMSM with Lq=Ld but I need to control it at low speed and even at zero speed.
I found HFI works only for salient motor, so it won’t work
But do you know other solution which could be used? On saturation principle for example?

Thank you !