Gonna have a go at a number crunching thread based off @DWMtweets Fact of Fiction articles (what can I say, I'm a fan and a geek). All information correct as of DWM 551 and includes episodes uptil The Timeless Children

The Fact of Fiction has covered 119/155 classic Doctor Who stories. These count stories from 1963-1989, dosn't include Shada and Trial of a Time Lord is counted as 1 story

The New Series, 2005-2020, FoF has covered 34/136 stories. This takes 2007s Utopia/Sound of Drums/Last of the Time Lords and 2017s Monk trilogy as 1 story each. It only counts episodes, not Children in Need or online episodes

As well as this, Fact of Fiction has looked at K9 & Company (#533), Dimensions In Time (428), The TV Movie (433), Children In Need (416), Time Crash (390) and Night of the Doctor (499)

119/155 classic stories, 1 TV Movie and 34/136 new stories, that means Fact of Fiction has covered a massive 154 Doctor Who stories out of currently 292

Stories left to do by decade:
19/50 1960s
10/58 1970s
07/47 1980s
00/01 1990s
24/46 2000s
68/81 2010s
09/09 2020s

The End of Time is classed under 2000s

The largest classic gap is The Rescue to The Romans, the largest new series gap is clearly The Eaters of Light to The Timeless Children.

The largest 'full run' is The Green Death to Pyramids of Mars.

Paul McGann is the only complete Fact of Fiction Dr Who, but Sylvester McCoy only has 1 story left to cover, that being Survival

That's all I've got unless anyone wants a list of what stories have appeared when