I have been saying this since almost a year now but. Last year I posted something in an old Indonesian posting and commented about how you can enter Indonesia with a 211A visa but it seem to have stirred up some heat so I discontinued to comment.
But I can say yes for over a year now you have been able to enter Indonesia on a 211a visa. I am a US passport holder and have entered and left Indonesia a couple times now since the beginning of 2020 with a 211a visa.
It is very very simple to obtain. You contact one of the many Indonesian visa agencies and apply for the visa through them, or you can do it yourself online but save yourself the hassle a let an agency do it for you. Everything is digital now. Last time it took about 10 days for me to get my E-visa and it will be emailed to you. You then have 90 days to enter Indonesia so this gives you plenty of time to organize hotel, flights, etc.
Once you are in Indonesia you can renew the visa every 30 days for up to 6 months. Renewal is supper easy you can do it your self for 500,000 IDR (this is what actually fee) or you can have an agency do it for about 800,000 IDR (agency makes money off you). Just spend the extra $20 and have an agency do it, this will save you lots of headaches in the long run. Also the agencies can renew you visa several months ahead if you want. This is what I do, for example this time I arrived in Indonesia in July 2021 and had them extend my visa till January 2022 since this is when I plan to leave, then I know I'm good for the duration of my stay. Also if you plan to stay longer then once 6 months you can reapply in country for a new visa either 211a or 211 and then your good for another 6 months.