Change of short PUCCH to long PUCCH increased PUSCH Throughput

Dear NR Experts,

In NR SA, I have changed short PUCCH → long PUCCH.
Theoretically after this change UL tput get reduced. As we are increasing UL PUCCH resources.
But observation in lab is exactly opposite. PUSCH tput has increased by 10-15%.

Any opinion from someone?

It depends on how many PRB are reserved for long PUCCH.
Vendor can configure it.