Q.grass growing in my Ajuga plants
Among my Ajuga ground cover I have grass growing. I can’t seem to control the grass, as I try to pull it out but there are too many. Is there a spray (or any other chemical) that will kill the grass and not kill the Ajuga? Thanks.

A lawn weed and feed would also kill you ajuga as it contains a herbicide.
Beside continuing to hand pull the grass you could try to use vinegar in a spray bottle to spot treat the grass. You would still need to be careful how you spray it.
https://www.gardeningknowhow.com/garden-how-to/info/use-vinegar-in-gardens.htm
https://www.gardeningknowhow.com/ornamental/foliage/ajuga/ajuga-bugleweed.htm