Can we power the LTE6 Kit with the RB4011iGS+RM POE out? Will it be standard POE where the connected ethernet port can be used as standard port also?

You know that are few standards of PoE ? Read wikipedia.

4011 documentation: https://mikrotik.com/product/rb4011igs_ ... ifications -> PoE-out
Voltage will be the same what you way of Power On the RB4011, if you power it via 24V then output will be 24V too.
You have 2 ways to power up that rb4011 and what Voltage you give at source that will be at PoEout.

1. Max out per port output (input < 30 V) 600 mA
2. Max out per port output (input > 30 V) 400 mA

ad 1) 24v * 0,6A ~ 14,4W
ad 2) 48v * 0.4A ~ 19,2W
remember that every meter of cable do lower voltage.

LTE6 kit-s are few.