I use this without issue:

10G SFP+ DAC Cable - 10GBASE-CU... https://www.amazon.com/dp/B00WHS3NCA?ref=ppx_pop_mob_ap_share

I have an RJ45 transceiver that cooks, this is cool by comparison.

Sure, its the Mikrotik CRS305-1G-4S 4-port SFP+ switch https://www.amazon.com/gp/product/B07LFKGP1L .

The SFP+ to 10GBaseT module I'm using to connect to the iMac is the 10GTek ASF-10G-T. https://www.amazon.com/gp/product/B01KFBFL16

The direct connect cable I'm using from my TrueNAS box to the switch is the 10GTek CAB-10G5FP-P https://www.amazon.com/gp/product/B00WHS3NCA