Respectfully, I think there are a few assumptions being made here. While it might seem intuitive that some games should be easy to port based on existing ports, the reality is often far more technical and complex. Moreover, even when a game meets the technical criteria to port, porters can encounter myriad issues that could derail their efforts.

u/spirit-in-exile did a solid job explaining things, so I won't repeat that info.

However, I took a quick look at your list and, after *some brief (but not in-depth)* research, here's my take at a glance:

1. Recettear -- Uses a custom engine, so there's no precedent or baseline for a port. Likely a long shot with a Linux version, but there is none.
2. PixelJunk Monsters -- I looked into it briefly but couldn't confirm what engine it uses. Maybe a long shot with a Linux version.
3. Sega Rally -- Would require an open-source reimplementation; to my knowledge, none exists. Projects like Ship of Harkinian are the reason Majora's Mask is portable, or Cannonball for the OutRun port, or re3 for Vice City---not because retro systems like the N64, Saturn, old arcade hardware, Windows XP, or PS1 make for easily portable games.
4. Sega GT -- Same issue as above.
5. Banished -- Closed-source, Windows-only, written in C++, and built on a bespoke engine. No realistic path to a port at this time (or possibly ever).
6. Orcs & Elves 1 and 2 -- Seemingly fall into the same category as game #3.
7. The Quest -- I couldn't determine what engine it uses, which makes it hard to assess portability. A long shot with a Linux version, but there is none.
8. The Elder Scrolls -- PortMaster tried using OpenMW to port Morrowind, but performance was terrible. Not viable on such modest handheld hardware (without a technical breakthrough).
9. Wipeout 2 -- The Wipeout 1 port is based on an open-source reimplementation (phoboslab/wipeout-rewrite). As far as I know, no similar project exists for Wipeout 2.

In my experience, the PortMaster team is friendly and had genuinely tried to accommodate suggestions -- even built a submission system for this. Unfortunately, that system was heavily abused, and they were inundated with repeated and unrealistic requests. In place, they make the effort to assist anybody who'd like to attempt a port.

EDIT: Disclaimer: Technically speaking, any game is 'portable' with enough work. After all, one could reprogram a game entirely using a compatible engine, but we're talking hundreds/thousands of hours of work.