Reiwa no Di Gi Charat Episode 5, "The Formidable Bushiroad!" from 2022, is a short, meta-humorous installment. In it, the cast visits the actual company headquarters, joking about corporate branding and trading cards.
"Reiwa no Di Gi Charat" Episode 5 (TV Episode 2022) - Serializd Reiwa no Di Gi Charat Episode 5
You can watch the episode on streaming platforms like HIDIVE, which offers English subtitles for the series. Reiwa no Di Gi Charat Episode 5, "The Formidable Bushiroad