Adjusting the size of the mobile navigation (hamburger menu) icon

Hi

I recently purchased a license for RapidWeaver Elements Pro to build different-looking websites for my clients than my usual WordPress sites, but I’ve already hit a stumbling block.

I know WordPress and my preferred WP theme builder like the back of my hand, but I am in that difficult transitioning stage of working out where everything is in Elements.
I am keen to persevere though, as I think it could speed up my workflow over time and allow me to offer my clients something different to what I currently do.

I find the default size for the hamburger menu (the three lines) too small compared to what I am used to, so I would like to increase its size, but I can’t find a way to do it.

Can anyone point me to what I need to do, please?

Would I need to create an SVG graphic and do it that way if I want something other than the default size?

If the option to increase the size of the hamburger menu in the settings isn’t currently available, would you consider adding it as the current default size just feels too small?

Thanks in advance for any help and I am sure this won’t be the last time I have to post a question.