How are you trying to access the drive, from the GUI or from CLI. If from the GUI, what are you using? (e.g. Gnome, KDE, etc.)
Can you ping the Windows box?
What kind of network is this? Hoe? Small business? Enterprise? What boxes (e.g. switches) lie between the Linux box and the Windows box?
I have a simple home network, wired and wireless. All devices connected to the network through my ASUS router. I used Linux Mint 20.3 on my Linux machines. I can ping all the computers on the network, and I can also ping the router. There are no switches between any of the devices.