Star Trek shows, ordered by the percentage of episodes that have a stardate

The Animated Series - 100%

The Next Generation - 96.6%

The Original Series - 90%

Voyager - 72.0%

Lower Decks - 60%

Deep Space 9 - 41.6%

Discovery - 35.7%

Short Treks - 10%

Picard - 0%

Here's the breakdown by season:

The Next Generation S3 - 100%

The Next Generation S5 - 100%

The Next Generation S2 - 100%

The Animated Series S1 - 100%

The Animated Series S2 - 100%

The Original Series S1 - 96.7%

The Next Generation S4 - 96.2%

The Next Generation S6 - 96.2%

The Next Generation S1 - 96%

Voyager S7 - 95.8%

Voyager S1 - 93.3%

The Next Generation S7 - 92%

The Original Series S3 - 91.6%

Voyager S3 - 84.6%

The Original Series S2 - 80.8%

Voyager S4 - 80.8%

Voyager S2 - 69.2% (nice)

Discovery S2 - 64.3%

Lower Decks S1 - 60%

Deep Space 9 S1 - 57.9%

Deep Space 9 S4 - 52%

Voyager S5 - 48%

Deep Space 9 S2 - 46.2%

Deep Space 9 S5 - 42.3%

Voyager S6 - 42.3%

Deep Space 9 S3 - 38.5%

Deep Space 9 S6 - 34.6%

Discovery S1 - 33.3%

Deep Space 9 S7 - 24%

Short Treks S2 - 16.7%

Discovery S3 - 7.7%

Picard S1 - 0%

Short Treks S1 - 0%