Did you find a fix by any chance? I have the same problem: my game loads fine even with replaced mods installed through other paths in the gamefiles (after SH update). But all my Add-Ons that used the dlc list are not loaded into the game. No syntax problems or difference in names in the dlc list that's all correctf. I'm all out of options rn.

@Kappa_IT indeed! also the website sometimes shows outdated mods, no one else has this problem?

there is a handling tag within the VEHICLES section, by clicking the tag all the handling mods available will be shown