Idk.
The Russian program seems to be weaker at operationalizing in 2023 but still has a lot of IP from the USSR era.
China is making massive strides but doesn't seem to have as deep IP experience yet.
Imo I wouldn't oversell the Chinese and undersell the Russians.
> JAXA and ISRO would most likely contribute with base components or related
That tracks, and fits with their specialities.
Also, I didn't realize JAXA, ESA, and ISRO are part of Artemis. NASA needs to have a better PR team. The Chinese Lunar Base is getting so much PR despite being much more behind Artemis
Edit: they signed the Artemis accords, they are not part of the similarly named Artemis Program
JAXA, ESA are considered partners on the Artemis program (at least based on Wikipedia, there does not seem to be an explicit list of partners on NASA's site), they're training astronauts to eventually be sent to the Moon in a similar arrangement as with the ISS. JAXA and ESA (along with the Canadian Space Agency) are also contributing various key components for the Gateway space station. Plus, the ESA is an important player with the Orion capsule which Congress-critters seem committed to forcing to be the center of the program regardless of technical and financial sense.
As for ISRO, I think I mixed things up a little. I think I had heard talk about the potential for an arrangement to fly a vyomanaut to the ISS on Dragon, assumed that it was about the agreement having been made and then mixed it up with Artemis. Turns out none of that was real, there does not appear to be any talk of sending an vyomanaut to the ISS.
I'd say that if everything goes perfectly from this point onwards, 2026 might see the uncrewed test of the system and maybe a crewed landing by 2028.
Similarly with Blue Origin's HLS, maybe New Glenn finally flies in 2024, but they too have so many steps to prove out first. JAXA and ISRO IIRC have seats on a future Artemis crewed mission, which would probably be how they get their first boots on the Moon. ISRO would probably be too busy with its LEO station at that point to make a crewed lunar lander, but JAXA and ISRO would most likely contribute with base components or related (rovers, orbital infrastructure).
The Chinese plans for a lunar base by 2035 are essentially imaginary in terms of partnerships, particularly since of them, China is the only one with any worthwhile space program (the Russian program being in steep decline and would be lucky to even pull off a proper ISS replacement by 2035 let alone a worthwhile contribution to a lunar base).