Which M5Stack Gray hardware revision do I have?

felmue

Hi there

I am wondering if it is possible to figure out exactly which M5Stack Gray hardware revision I have.
According to the Quick Start guide some hardware changes have been made over time:

2017.9 Initial public release
2017.12 MPU6050+MAG3110 changed to MPU9250
2019.6 MPU9250 changed to MPU6886+BMM150
2019.7 TN screen changed to IPS screen
2020.3 Battery capacity changed from 150mAh to 110mAh

Here is what I know about my unit:

bought from a local dealer on July 2020
board reads: 2018.3
IP5306 can be controlled via I2C
MPU6886 and BMM150 included on daughter board
IPS screen (I guess as it is quite good, but I have nothing to compare about)
battery reads: 150mAh

Assuming I am correct about the IPS screen that would put my unit between 2019.7 and 2020.3.

Are there any other indicators that would tell me more about my unit?

For instance, are there newer boards than 2018.3 out there?
Are MPU6886 and BMM150 integrated on newer boards (assuming they exist)?
Is there a specific schematic for the M5Stack Gray (including MPU6886 and BMM150)? The only schematic I found so far is for M5Stack Basic Core (and w/o MPU6886 or BMM150)

Thanks
Felix