Surface cleaning is obtained by removing debris, dust and dirt without the surface being worked on deteriorating as a result of the operation or due to subsequent reactions caused by the operation itself.
Sanitising reduces the bacteria identified on the product label to a safe level. Sanitisers typically have ‘light’ cleaning ability and should be tested and certified to a standard in accordance with your countries requirements eg in Europe and the UK it’s typically a BS EN 1276 test.
Examples of good sanitisers are S1 https://cleancareireland.com/product/clover-dose-it-s1-sanitiser/
Disinfecting actually kills bacteria and if your disinfectant is virucidal (tested to BS EN 14476) it will also kill viruses. Disinfecting is typically for medical environments or where the is bodily fluids like vomit or blood. It is also good practice to disinfect if there is a known virus outbreak hence Virucidal disinfectants have recently become more commonly used following the Coronavirus outbreak of 2020
Examples of Virucidal disinfectants are Micro Kill which is pleasantly fragranced https://cleancareireland.com/product/craftex-micro-kill/
or Ultra AX which is a fragrance-free food-safe virucide https://cleancareireland.com/product/ultra-ax-virucidal-disinfectant/