Hello,
01. To customize the mobile menu, please go to Appearance > Menus and assign your preferred menu to the “Mobile Side Menu” location. You can also edit the “Mobile menu” element in Header Builder to adjust its layout, position, search form, account links, wishlist, compare button, and other options.
02. Regarding the product links, I see you have WooCommerce maintenance mode enabled, Try disabling maintenance mode in WooCommerce Settings > Site visibility > Select the live option, and check the issue.
Please refer to this screenshot: https://ibb.co/xK4WvNDJ
03. Unfortunately, we do not currently offer a special discount for purchasing an additional WoodMart license. You can purchase the second license at the regular price from Themeforest.
The next discount will likely be during the Cyber Monday event this year.
Best Regards