CD4043B: Regarding Propagation time

Part Number: CD4043B

Tool/software:

Hi experts,

I have a question regarding the output propagation time.

The datasheet has “Max value for tPLH = 300ns under VDD=5V”.
Under VDD=3.3V, what would be the MAX value for tPLH?

In actual measurements, under VDD=3.3V, tPLH was approximately 3 us.
Also, is there a way to reduce the delay time?

Thank you.