If you have an item in your main hand and then swap it with "F" key or your custom offhand slot key can trigger wardens/sculk sensors. However, swapping the item from the offhand to the main hand doesn't make vibrations.
Expected behavior
Swapping items from your main hand to your off-hand would not generate vibrations.
How to reproduce
Get any item and place a sculk sensor.
Swap the item to your off-hand with "F" key.
Notice how the sensor gets triggered.
Can confirm in 22w13a