I often see this accusation levelled at Dyche but heatmaps tend to show that Mykolenko does get forward. He spent way more time up the pitch than either of Forest's fullbacks and it's a recurring theme. The difference was that when they did get forward the Forest fullbacks did something with the ball.
Here's two heatmaps. The left one is Aina who was at RB up against Mykolenko and the right one is Mykolenko. Arrows at the top indicate direction of attacking play.
View attachment 288617
Which one is getting forward there and which one is acting like a
'wide centre back'? Mykolenko is given full license to get forward but does absolutely nothing with it.
As for Patterson he definitely got forward more than Young but both of them got forward a lot more than the Forest player at LB they were up against. Not got Pattersons but here is Young (right) and Nico Williams (left) who he was up against on the flank.
View attachment 288619
That's not to defend Dyche to the hilt or anything like that as there are plenty of choices he makes which I don't agree with but some of the attacks on here about what he does or doesn't do are often based entirely on tropes rather than actual facts.