Same thing here with Dell P2715Q connected to Macbook (Intel and M1) with Lenovo 40AF USB-C Hybrid dock and DisplayLink v1.3 (Build 56.111).
Display works great, but lacks scaling options that it has when connected directly.
In case of Intel-based Macbook Pro it has full 3840x2160 (UI way too small), 'looks like 2560x1440' (slightly big and the quality here is bad compared to the same setting run direcly) and 1920x1080 which looks good but is just huge.
In case of M1 Macbook Air it has full 3840x2160 and the next one is 1920x1080 + a lot of even lower-resolution options.
Using the option+click trick I get more resolutions to pick from but never the perfect 3008x1692.
I really hope this gets resolved, otherwise I just got another 'almost perfect' dock :-/
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