Hello,
Thanks for using our theme.
Mega menu was created using static blocks, for example https://prnt.sc/26qh4tx > https://prnt.sc/26qh57o
Here you can find some videos about menu – https://www.youtube.com/c/8theme/videos https://youtu.be/f07MBdnFPfk
Do you mean an additional plugin Mega menu? Try to use our features, maybe there are no needs in 3rd party plugin.
Please check this example of sale product – https://prnt.sc/26qh6k0 – https://prnt.sc/26qh6o5 + https://prnt.sc/26qh6r0
Regards