Premiere pro not using 1050gtx ti

Sadly, this cannot be performed at all by the owner or user:

In laptops such as these, the display connection(s) are permanently hardwired (at motherboard level) to the Intel HD or UHD graphics. Therefore, the Intel graphics cannot be disabled at all - not even in the BIOS/EFI. The only way that this could be done is at the factory (or manufacturing level), by hardwiring the motherboard's display connections to the discrete GPU - and that would have semi-permanently disabled the Intel graphics, and therefore QuickSync, unless the laptop manufacturer also made a provision to enable the Intel multi-monitor support in the BIOS/EFI.

And of course, this assumes that you ARE using any GPU-accelerated effects, such as frame rate changes, scaling to a different resolution and certain other effects. If on the other hand you are using no effects at all whatsoever, then only the CPU is used for rendering.

For the record, my main desktop PC has both the HD Graphics 4600 and the GTX 1050 Ti enabled, and while my monitor is physically connected to the GTX 1050 Ti I also have the Intel multi-monitor support enabled. In my Cineform-to-H.264 exports with a frame rate conversion from 30.00 FPS to NTSC 29.97 FPS I got nearly 50% usage on the Intel graphics while also getting around 20% to 25% usage on the GTX 1050 Ti.

And what video codec (H.264, MPEG et al.) are you exporting to or transcoding from? If H.264, then a LARGE part of the Intel GPU utilization comes from the Intel QuickSync hardware encoding or decoding feature. And even if there were some utilization of the discrete GPU for rendering effects, the Intel graphics still gets fairly heavy utilization when transcoding from or exporting to H.264.