If it's a non-visual DLL you can use the .NET DLL Importer feature of PB 2022 R3.

Unfortunately, Microsoft abandoned the Interop Forms Toolkit that solution was based on.  It's still accessible on archive.org and there are some folks try to make it still work with more recent versions of Visual Studio:  https://github.com/hurcane/Microsoft.InteropFormTools.InteropFormProxyGenerator.  However, I wouldn't recommend relying on it anymore.

The toolkit just makes the task easier, the underlying functionality is still supported by .Net.  There's a rather old blog article on the Telerik site that explains how to do it without using the toolkit.  To be honest though, I haven't tried it out to see if it still works:  https://www.telerik.com/blogs/wrapping-a-net-user-control-as-an-activex