You could drop in into an adapter but then it'll bring up the matter about which lanes/slots are being shared and if you have ample lanes for adding another NVMe drive. You forgot to state the most critical fact, that, your full system's specs. List them like so:
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
What you're looking for is known as a PCIex4 riser card for M.2 NVMe drives.