Any good short series to watch during pandemic of COVID-19

His Dark Materials

Ash vs. Evil Dead. One of the best things Netflix has to offer.

Definitely The Queen's Gambit and Mindhunter
We're bingeing Dark Matter - pretty good
And Dark is next on the list now that it's complete
If you never watched Breaking Bad and Better Call Saul - both awesome series but not short.
If you like comedy - Comedians in Cars Getting Coffee is a bit hit or miss in terms of hilarity but the cars are awesome and there are a slew of different comics. Each is short - about 20 minutes.
Plus my all-time favorite - The West Wing - all seven (?) seasons.
And they added Dexter - if you never saw it, I highly recommend this series.

Recently i watched Fargo and The Haunting of Hill House and i loved then. Also, if you like animations i would recommend Love, Death and Robots, Close Enough and The Promised Neverland.

Future Man
Tales from the Loop

Chernobyl
Devs

death note anime ---> better than some films of 300 millions cost (really you will start watching it and you will watch it all in 2 days non stop)
kakegurui live action or the anime, choice one, both are amazing even the live action it's amazing
sword art online
alice in borderland
slayers anime
the travelers
lost in space
spartacus
prison break ---> :P
the hundred

I don't believe "Barry" wasn't mentioned yet, It's a great series so far!

Altered Carbon https://www.imdb.com/title/tt2261227/, only 2 seasons sadly was cancelled by Netflix.

Not sure what OP means by short.

The Good Place! only 4 seasons, but episodes lasts no longer than 25 minutes. Really fun, amusing, charming and mood-improving tv serie. Perfect for lockdown time.

I've seen Twin peaks S3, plus some old stuff that i would recommend for like 2 seasons: OZ, Deadwood, Rome.

Brooklyn Nine Nine!

Orphan black, the best decision ever made, i dare to say it's even better than breaking bad, and just 6 seasons. Oh, also Community.