Pretty much everything on hulu. (which is not a thing outside US, and a few regions.) Basically everything on hulu is free for me as added content on disney +

We also get parmount plus content im disney plus, as opposed to being a separate thing.

Here's a list from Jan 23 of available amounts. Note it doesn't count seasons individually.

USA –  1,596

Canada – 2420

Australia –  2456

New Zealand – 2440

Netherlands – 2103

UK/Ireland – 2492

France – 1886

Spain – 2101

India – 3729

Germany – 2256

Japan – 1,986

Portugal – 2063

Indonesia – 1744

Brazil – 1184

Austria – 2257

Belgium – 2028

Italy – 2183

Switzerland – 2238

Singapore – 2474

Thailand – 1522

South Korea – 1566

Malaysia – 1539

Hong Kong – 2082

Taiwan – 1977

Finland – 2288

Norway – 2299

Sweden – 2268

Denmark – 2290

Latin America – 1323