Hey Joko,
you might want to be careful what tabs you look at. I think I found the same tab as you, and it doesn’t seem like the person understands music very well. What they’re trying to describe is a chord inversion (octaves are used more to describe a note’s or chord’s relationship to another note or chord rather than the chord itself). At the bottom of the tab, they even say, “This is a very difficult song for me to have discovered. If there is anything wrong, I am not surprised.” To me, it sounds more like the song’s chords mostly change from A to G not really E, A, G. I think this tab might be more accurate:
https://tabs.ultimate-guitar.com/tab/the-moody-blues/legend-of-a-mind-chords-1048671
For the Asus2, you could play it on uke, but to me it sounds better if you play an Aadd9 instead:
A-2
E-0
C-1
G-2
The Add9 feels more well defined. The sus2 sounds too similar to the AMajor to me. You can use the chord inversions for these chords too, but I think the regular A and G chords sound great as is. You gotta remember that for people figuring out songs on Guitar, their higher inversions are actually the normal open or low fret chords on the ukulele. If you change the chords to inversions on the uke, it’s probably even higher than the original is playing. For this song, it might work cause it sounds like they recorded using a 12 string guitar, but it doesn’t seem necessary.
I hope this helps. I could be wrong about the chords. I’m just using my own hearing and comparing what the tab says and what I can hear in the song. Be careful about what you learn from Tabs. Sites like Ultimate Guitar aren’t vetted well, so a lot of times Tabs will be incorrect or incomplete. That’s where you have to use your ear to try and really distinguish what is being played.
Aloha,
-Kahai