Old-ish is the third spinoff in Barris' ish empire which, in addition to the flagship series, includes ABC-turned-Freeform entry Grown-ish, starring Yara Shahidi, and Mixed-ish, a 1980s-set prequel built around the younger version of Tracee Ellis Ross' character, Rainbow.
Sorry, no info about the next episode of old-ish is available yet.
The TV show is either in vacation or waiting to start their new season. When information about future episodes becomes available, it will be posted here.