If it’s an older switch and doesn’t give a specific LED rating, then yes, the VA in LEDs that the switch can support will Typically be much lower than the wattage for traditional incandescent bulbs. The reason has to do with something called “inrush current” and it’s because the LEDs have a very high current draw when they first start up, then they drop down to the regular operating level. The usual rule of thumb is 1/3 of the rated incandescent value as a maximum for LEDs. But there are many electricians who use a rule of 1/10 just to be absolutely safe— especially when they are writing articles!
That said, most of the newer devices will show two ratings, one for “resistant” loads ( Halogen or incandescent) and one for LED loads, which are “inductive.”
Also, because of the different physics involved, many devices will have a minimum load rating, typically 20 VA, for inductive loads like LEDs. So there may be a minimum number of bulbs required, or else you have to add a separate device called a “bypass”.
So just check the specification for each device carefully so you know whether you are looking at the LED specification or not.