Interpol's legal team will take one look at Malaysia's request, laugh, and then respectfully decline to assist. They won't be wasting any of their resources on this.
Malaysia has no power to actually do anything about this, so I think they're just trying to use strong rhetoric to have a chilling effect on anyone who's thinking about making similar jokes.
Scenario #1: GOP contenders believe that Trump's legal troubles will be his undoing before the 2024 Republican convention. DeSantis will be sunk by similar legal troubles, or lack of electability outside of Florida. Despite current polling, the field will look very different by early 2024 and they want to position themselves now as the alternatives who aren't going to prison.
Scenario #2: Trump and/or DeSantis avoid their many scandals, somehow, and they're going to be looking for a vice president. It's unlikely that Trump will run with Pence again, so Nikki Haley, Francis Suarez, and the rest are looking to distinguish themselves as vote-getters so they will be seen as a good addition to a Trump or DeSantis ticket.
Either way, I don't know what the hell Pence thinks he's doing in this field.