What are you planning to connect to it?
If you're planning on connecting your power adapter, one or multiple video adapters, multiple USB ports, etc. then you'll want a Thunderbolt dock.
Common mistake people make is buying a USB-C dock because they see it's so much cheaper, but the bandwidth just isn't there.
You can cheap out and get a normal Thunderbolt 3 dock as well. Don't necessarily need a Thunderbolt 4 one if the cheaper one has all the connectivity you need.
https://www.facebook.com/marketplace...61229673343872
This one for $50 will probably work. Just need to check the wattage on the included power brick vs. what your laptop needs. If you have a standard Thinkpad, it'll probably be fine.