Hi, This video shows how to set the TPS on a 2018+ model using a voltmeter. The video shows using an breakout cable to read the TPS voltage.
Breakout lead for setting the TPS correctly using a multi meter. As new £20 plus postage , cheers.
www.gsxs1000.org
You can back probe the TPS connector using a good back probe tool kit .Do a search on using a adaptor/patch cable or a back probe tool.
I would make sure the clutch switch is working properly
first as it is the easy part to get at

.
On my 2019 bike ( I have the standard clutch lever ) WITH the lever pulled
in the switch is
ON a as the lever is released at about 15mm from the handlebar grip the switch is
OFF. Hope this helps.