Win11 Pin a jnlp shortcut to taskbar with custom icon

So my company uses a few different things that use jnlp shortcuts, the desktop shortcuts are just the usual Internet Shortcuts with a url like jnlp://app.company.com:8001/prod/client.jnlp. I'm trying to get a couple of these pinned to the taskbar but if you run the app and right click on it while it's launched and select "Pin to taskbar" it just pins the Java Web Launcher shortcut not the jnlp url. The shortcuts already exist in C:\users\public\Desktop and have custom icons for each one. Those work fine, I just have a user who is asking about putting them in his taskbar and wants the custom icons for each to show up.

Copying the shortcut to the \AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar folder doesn't work. Drag and drop doesn't work in 22H2 anymore. Since the jnlp URL launches from a separate webpage I can't use the "More tools > Pin to taskbar" in Edge/Chrome.

Any assistance would be appreciated.