Grove/Metal 52 ac specification: what MIMO?

I can not find the specification of the wireless chip QCA-9889 in Grove/Metal 52 ac – what’s MIMO?

Are you looking for mimo at single chain device?

Yes, interested Specification (datasheet) on the wireless chip QCA-9889.

I asked himself - he replied:
In QCA9889 MIMO Configuration 1x1 (1-stream)
Source: https://www.qualcomm.com/products/qca9889