Is my new wiring to the code?
In my jurisdiction they would call that bundling and flag it.
They normally won’t say anything with 2 cables and some areas up to 4 but when there are more than 3 current carrying we have to start derating
over 8 current carrying conductors the built in safety in #14, #12 &amp;#10 exceed what is allowed.
there can be some issues there even though nipples less than 24” don’t have to be derated a long run like in the photo is normally flagged with more than 4 is all the states I have worked in.
I see 6-3 , 8-3 &amp; 12-2 x2 10 current carrying conductors as I said most jurisdictions would flag this as bundling.