I have the dongle that comes with logitech mx keys keyboard,Logitech® Unifying Receiver will that work?What specific Logitech dongle do you have?
Adding BT to a desktop is rather easy, and inexpensive:
https://www.amazon.com/TP-Link-Bluetooth-Receiver-Controller-UB500/dp/B09DMP6T22
This adds wireless networking as well: https://www.amazon.com/Ubit-Bluetooth-Wireless-Technology-Streaming/dp/B08K8ZNT54?
Last, many modern motherboards include BT and wireless capabilities. What is the make/model of your motherboard?
The motherboard does not come with BT.I have the dongle that comes with logitech mx keys keyboard,Logitech® Unifying Receiver will that work?
Motherboard:A78M-E45 V2 (MS-7721)