As far as I know, VE is supposed to be enabled by default to all users including anons in most Wikipedias, except English and a small number of others where there's no community consensus or issues with typing the alphabet.
Typing doesn't seem to be an issue with the alphabet that is used for Amharic (am) and Tigrinya (ti). I just tested it with the default keyboard layout on Windows 8 and it worked perfectly. But VE is not enabled in Amharic and Tigrinya Wikipedias.
Per T93387#1757164:
- all types of Latin (bug, cdo, cr, gv, hak, sh, za, zh-min-nan)
- <s>Cherokee (chr)</s>
- Georgian (ka, xmf)
- Armenian (hy)
- Greek (pnt)
- Ge'ez (am, ti; T116523)
| am | Amharic | Ge'ez |
| bug | Buginese | Latin, Lontara |
| cdo | Min Dong | Latin |
| cr | Cree | Latin, Syllabics |
| gv | Manx | Latin |
| hak | Hakka | Latin |
| hy | Armenian | Armenian |
| ka | Georgian | Georgian |
| pnt | Pontic | Greek |
| sh | Serbo-Croatian | Latin |
| ti | Tigrinya | Ge'ez |
| xmf | Mingrelian | Georgian |
| za | Zhuang | Latin |
| zh-min-nan | Min Nan | Latin |
I believe that it should be work there by default.
EDIT: this group was dubbed "Phase 6.1" a while ago.
It actually doesn't include Cherokee, which was included in a different group in another task. Although the wiki may be small and there may be no technical blockers to deploy there, there was no active communication locally of an upcoming deployment, so that's postponed.