Lakemaster for Garmin 93sv

Has Lakemaster built a chip for Garmins yet,..??

Nope, I wouldn't look for them to either since Garmin owns navionics. I would expect lakemaater to stay exclusive Humminbird

so does HB/Navionics have a chip...

Navionics still works in Humminbird units as well as Lowrance and Raymarine. Some other lesser known brands also.

Johnson Outdoors ( owns Humminbird, Canon, Minnkota) also owns Lakemaster so all of the Lakemaster map products work with Humminbirds ONLY.

Even though Garmin owns Navionics now, I don't think any Navionics map cards work in any Garmin units.
They are using the Navionics data incorporated into their map products.