Precision 3551 charger and Thunderbolt

I have a dell precision 3551 and upon purchase the configurator obliged me to take the 130w usb c charger (he said it was for the graphics card). So i have only one usb c port (thunderbolt) and i'm forced to use it for charger but i have also the barrel 7.4 mm AC port without any compatible charger. If I buy a 90W charger with 7.4 mm barrel (which the online configurator did not let me take) can I use it in order to free the usb c port? Is there any other accessory that allows me to free the usb c port? Is there any other accessory that allows me to free the usb c port or the only option are the dock stations?

The configuration: i7-10850H, 32 GB RAM, 1TB SSD M.2, Quadro P620, FHD display.

Thanks.