So I bought the Nest Wifi router & point 3 years ago now and they've been working great, but I need just a little more wifi on the garage side of the house. Can I buy a similar router and configure it as a point/extender? Thanks! Ben
You can add an additional Nest Wifi point to your network if that's what you mean. Just make sure you buy it from the same country as where you bought your original Wifi devices from.
If you mean can you use Nest Wifi with third party wireless extenders, see the advice here:
