Since the jinja codegen switch in #2333 the RTD docs for mf6 have been clipped.
For example compare mfgwegwe docs from 3.9.2:

Versus 3.9.3:

The later version doesn't describe the child items. Similar examples can be found for each package, e.g. mfgwfevt for 3.9.2 looks good, but flipping forward to 3.9.3 looses all stress_period_data docs.
This is related to a flopy bug where the modflow-devtools version docs uses "item" instead of "items". However, the fix is not straight forward, as this may involve modflow-devtools' dfn2toml conversion. It's difficult to trace this issue.
Since the jinja codegen switch in #2333 the RTD docs for mf6 have been clipped.
For example compare mfgwegwe docs from 3.9.2:

Versus 3.9.3:

The later version doesn't describe the child items. Similar examples can be found for each package, e.g. mfgwfevt for 3.9.2 looks good, but flipping forward to 3.9.3 looses all stress_period_data docs.
This is related to a flopy bug where the modflow-devtools version docs uses "item" instead of "items". However, the fix is not straight forward, as this may involve modflow-devtools' dfn2toml conversion. It's difficult to trace this issue.