USB C docking station

This docking station requires computer/smartphone with a thunderbolt 3 or a full-featured USB C port that supports DP ALT mode.
DisplayPort over Alt Mode. DisplayPort Alt Mode (DP Alt Mode) allows a USB-C equipped computer to connect directly to a display or monitor.
Type C gen1/2 and thunderblot3 will be compatible.

If you laptops support MST extend mode, then yes, but most windows support max 2 monitors extended, mac OS only support mirror and non-mirror mode, non-mirror mode shows 3 same monitors but differ from the laptop.

This dock can work with macbook pro 2019 edition.
Yes, this dock can work with Dell Latitude 7480 and Lenovo T480, also support dual monitors setup.
No, it can't, any converter is not recommended, it may cause some unknown issues.
Yes, please make sure use a standard or original mini DisplayPort to DisplayPort cable, this dock have a DisplayPort 1.2, support 4K@30Hz.

Hi, Yes, you can use the hdmi and vga as the same time, the resolution can up to 4Kx2K@30H
Please make sure that the original or standard cable to connect your monitor/TV/projector is using.

Yes. It can. When mounting power-hungry devices ( such as power need is more than 1.5A SSD or HDD ) through the USB3.0 port, an external PD( USB-C) power adapter is recommended to be used, so that the external hard drive can work properly.
It doesn't need its own power cord. Just connect Type-c male port and if you need to charge your laptop, connect power adapter into type-c female port ( PD ).
It will not charge a laptop unless you plug in a type-c charging adapter to type-c PD port. There are 2 type-c female ports, one is for PD charging ( 20V/5A), the other is for data transmission ( 5Gbps ).

USB C hub / adapter

USB Port Power Adapter