That’s even worse If your performance Is from the floor ( you have a higher ROM to develop peak power )
Jump squat really can’t tell me a damn thing.
To test strength deficit I suggest:
test VJ from the floor
then depth jump 6"
then depth jump 12" etc, see how much you can go higher by using elastic energy
Strength deficit: It’s not something discussed that frequently here since the vast majority(100% of high levels sprinters at least) of sprinters are speed dominant (they have no problem deliver optimal force in the ground). Strength dominant athlete (maybe you If you lack RFD) means that you have nice max potential, but lack time to exploit force in lift such as Power Cleans, even more in sprint where you have very short time to apply force to the ground.
Are you already doing some sprint, plyo, Med.Ball etc? If you are not that advanced in sprint, you may benefits of higher volume of Med.Ball and low impact plyo since the speed stimulus in the sprint Itself would be lower since your speed…is lower.
I must add that, every problem here might be only technical problems in the lift Itself.