PS5 is backward-compatible with 99% of PS4 games tested, Sony says
Companies, agencies, institutions, etc
PlayStation
the Washington Post
Sony
PS5
PS4
Microsoft
Cyberpunk 2077
Projekt
Activision
PS5 Digital Edition
People
Jim Ryan
Groups
Asian
Physical locations
Europe
the Middle East
South America
Places
PS5
Locations
U.S.
Japan
Canada
Mexico
Australia
New Zealand
South Korea
China
South Africa
Events
PlayStation 5 Showcase
the Xbox Series X
Black Ops Cold War
Summary
Sony has yet to provide even a partial list of PS4 games that will work with the PS5, or any sense of how many titles will be compatible with the console at launch.
As said here by Susana Polo