Choosing a 1S high current buck driver for SBT90-R (red, low voltage)

Flashlight Modding and DIY Parts
1

I’m thinking of building a convoy L21b with an sbt90-r, and I’m wondering about a suitable driver for it. Convoy has a 22mm 1S 10A 3V buck driver, how would I go about adjusting the output voltage range to match the 2.7V or so Vf of the red SBT90?

Pictured here is the driver

Screenshot_20241111-130549_Fennec
Screenshot_20241111-130549_Fennec1080×1122 130 KB

2

I guess this drivers is constant current adjusted? But what buck converter it use and how low it can go?