Welcome back to the Community, @Alexey Danilov.

Currently, only the Master Admin can access the Mileage tracking feature in QuickBooks Online (QBO). The ability to let other users use it is not yet available.

I'll pass along your suggestion to our Product Developers. They're always looking for ideas from users on how to improve QBO. In the meantime, I recommend visiting our Blog site. This is where we share recent happenings and future developments, such as updates to newly added features.

Just in case, I'll add this article for future reference: Track mileage in QuickBooks Online.

Please let me know if you have any other issues or concerns, and I'll get back to you right away. Have a wonderful weekend!