Macbook Air trackpad Click is not working phsyically

FYI, a battery could be swollen even if the battery condition is "Normal". No matter what, this sounds like a hardware failure of some sort. The Trackpad no longer has any physical movement for the clicks. The clicks are being simulated by the Haptic Feedback feature of the Trackpad, so the Trackpad may have failed and needs to be replaced.

Have Apple or an Apple Authorized Service Provider examine the laptop to confirm the issue and provide you with a repair estimate.

There are no actual macOS virus. There is adware & malware. I'm not aware of any software issues that would affect the Trackpad in the way you have described. It sounds like a hardware issue to me.

You can try booting into Safe Mode to see if the Trackpad issue still exists or into Internet Recovery Mode (Command + Option + R for Intel Macs only), or even the Apple Diagnostics to see if the Trackpad still has the issue. Safe Mode prevents third party software from launching automatically during boot & login, while Internet Recovery Mode is booting from an online macOS installer (not sure about the M-series Macs though since they may be loading from a hidden recovery mode partition on the internal SSD, but it should be safe & unmodified since it is hard to modify it since it is hidden & not easy to access while booted to the internal SSD), and the diagnostics are using just a very basic & simplistic interface.

A Windows virus would not be able to affect a Mac since the operating systems are completely different architectures.