For the sake of anyone reading this in the future, Ittle Dew 2+ has:

• Much slower loading times, which is why timing is now done with in-game time. If you submit a run and do not enable the IGT from the menu, you must at least show the final time by going into the Load menu and hovering over the file you just completed, which lists the time there;
• New dungeons accessible in an optional area, complete with a set of collectible cards. Aside from these being excellent dungeons, they allow for some new speedrun categories;
• Nerfed difficulty, enemies (or at least bosses) have a little less health. For the purposes of in-game time (therefore excluding loading times), this effectively makes ID2+ faster than vanilla ID2;
• The "Record" option in the extras now lists the IGT WR for other players who've played on Switch and connected to the internet.

Note, a huge skip (Out of bounds glitch!) was just found by Gigo here, a link for which can be found in that Discord server.

Any way we could rectify that perhaps? I'd gladly mod ID2 myself since I run all categories, but it's usually best not to accept your own runs from what I understand, so that wouldn't solve the issue for me at least.

I posted a run of my own two weeks ago, does this game have any active mods?

Totally agree. Video evidence should be a requirement.