Ubuntu 16.04 fresh installation does not recongnize any wifi network

I have a fresh installation of Ubuntu 16.04 in my minisforum minipc model Neptune HX99G/HX100G.Before that, I had Ubuntu 22.04 installed and I was able to access all available wifi networks. But after installing Ubuntu 16.04, there is no wifi network showing. I ran a series of troublshooting to get to the deep but has not managed to solve the problem. Here is what I have tried

lspci | grep -i wireless shows no output

rfkill list shows the following output

0:hci0 Bluetooth SOft Blocked: No Hard Blocked : No

lshw -C network shows the following output

*

*-network UNCLAIMED            description: Ethernet controller       product: Intel Corporation       vendor: Intel Corporation       physical id: 0       bus info: pci@0000:04:00.0       version: 04       width: 32 bits       clock: 33MHz       capabilities: pm msi msix pciexpress cap_list       configuration: latency=0       resources: memory:dc900000-dc9fffff memory:dca00000-dca03fff memory:dc800000-dc8fffff  *-network UNCLAIMED       description: Network controller       product: MEDIATEK Corp.       vendor: MEDIATEK Corp.       physical id: 0       bus info: pci@0000:06:00.0       version: 00       width: 64 bits       clock: 33MHz       capabilities: pciexpress msi pm cap_list       configuration: latency=0       resources: iomemory:7e0-7df iomemory:7e0-7df iomemory:7e0-7df memory:7e90300000-7e903fffff memory:7e90400000-7e90403fff memory:7e90404000-7e90404fff

I have also tried to use this solution mentioned here (https://community.linuxmint.com/tutorial/view/1796) but again did not find luck.