Can I add more items to the main menu?
Does it benefit your user?
Keep it as simple as possible. Help your users find what they’re looking for in the easiest and quickest way possible. This helps with conversions and improves UX.
The average human attention span has declined from 12 seconds in the year 2000 to 8 seconds now. This is much shorter than the attention span of a goldfish (at 9 seconds). Source.
Give your potential customers what they want in the simplest way possible.