The retail scooters have this weird thing where you have to "Activate" them before they can go to full potential. Before activation, the scooter beeps constantaly and runs at a lower top speed. It also prevents access to the rest of the features.
Typically to activate the scooter you connect to the Ninebot app and click the little gear icon, then click activate and hit yes. This activates the scooter and essentially unlocks it. You could give this a shot, however since the scooter is an ex-Lyft it is possible this wont work. If not, you may have to flash the ESC with the fulldump file. The Segway app has the ability to modify a different area of the ESC than CFW writes to. This is why just flashing a CFW might not be enough, so its possible you may need to flash the fulldump.
An example of this is how you can go into the segway app and set motor braking to max, then flash a custom firmware but you will notice the motor braking is still set to max until you go in the app and change it back. The only thing that can write the entire chip is flashing the fulldump via ST-Link.
TLDR; Go in the Segway app and click the gear icon, then click activate and hit yes. If this fails (which it may since its an ex-lyft), you will have to flash the ESC with ST-Link and the fulldump file.
PS: If anyone has Telegram, I am in the Scooterhacking.org group and am pretty much reading that throughout the day. If you need faster help or just wanna chat live, thats where I am To view images REGISTER or LOGIN for full access.