For wastegate control I need boost by gear and rear vehicle speed but I can`t find it in the software.

You would assign the rear speeds under sensors to the vehicle speed and fronts to driven speed. Then you can set the gear detection to learn by ratios.
After this go to Calibration Switches – Boost control and here you have change the boost per gear for each map position you are in using our 8 Position switch.
You can also alter the Nitrous and boost delivery after the launch based on time or speeded if you look at the bottom on Launch control settings.

If wanting to control vs Speed then you can create a custom Comp Map

Should this answer not help, please feel free to contact the authorised Syvecs Dealership you purchased your ECU through.