
Nope. Your old dock won't work with the Switch 2. The console is bigger and needs a new dock anyway.
The Switch 2 is larger. It has a 7.9-inch screen compared to the original's 6.2 inches. It literally won't fit into the old dock. You'd damage something trying.
Even if size wasn't an issue, the old dock can't do 4K. It maxes out at 1080p. The Switch 2 dock has HDMI 2.1 for 4K HDR output. Different hardware.
The Switch 2 comes with its own dock in the box. You're not missing out on anything. Only buy extra docks if you want them in multiple rooms.
The original Switch can actually use the Switch 2 dock if you put it in there carefully. Same USB-C connector. It won't do 4K (the original Switch can't), but it works. Not officially supported, but people have done it.
If you have one of those compact portable docks, it might work with Switch 2. Depends on the size and how the connector is positioned. Check before assuming your travel setup still works.
Where this comes from: This answer is based on ShopSavvy's product database, real-time pricing from 4 retailers, and a look at hundreds of user reviews to give you a well-rounded picture.
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