I don't have a solution but want to add my 2017 Macbook pro has the same exact issue as you.
I'm using a Targus Universal Dock DOCK180USZ and it outputs QHD @ 144hz fine on a Windows machine but only does 60hz on my Mac, despite the Mac saying it's outputting at 144hz.
DisplayLink software v1.7
MacOS v 12.5.1
Monitor: Asus XG32VQ
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