I don't think that is possible. The only sort of AG you can create on a Standard Edition is a Basic Availability Group, which is a two-node AG with no readable secondary. I can't say for sure that it cannot be clusterless (i.e. read-scale), but since it cannot be readonly, there is little point in any way.
If you want this combo, you may want to consider log shipping or transactional replication.
You would have to be little careful and not use features not supported on Standard Edition, although that is less of problem these days.