Web core vitals CLS issue for site navigation

First of all,
Thank you for the great theme !
I am using your theme from last 3 years but 2 days back I have checked my site with Google web page speed test.
And it found that navigation menu of my site is causing cls issue ( one of the from web core vitals )

As this is the ranking factor, I would like have a solution from you guys. 5 items from My mobile menu is adding to content layout shift.

So kindly provide the solution so that many users like me take the advantage of this ranking factor.