My first thought was yes, use a foot switch. Then I read the soft-start comment and started to re-think my answer.
If the stop-start switch on the saw is a simple on-off switch - like a light switch, then a foot switch should be OK as it is also an on-off switch. If there are electronics built into the saw's switch, then it might be a different matter.
I don't know your saw but if the parts diagram shows a switch and a separate circuit board for the speed control and soft start, then your foot switch should be OK.
I wonder if anyone else has tried a foot switch with your saw. Perhaps if you post the model number you could get a more definite answer.
Good luck,
Jim