When can faire directly add the following content in French, and when can faire de be used?

In French, faire is the most common verb in the third group, and its direct present tense is as follows:

I am very happy

You failed

il fait

Elle fyt

nous faisons /f？ z/

You failed

Ils font

Els font

Faire is a direct transitive verb. In any case, it follows the object directly. But when the object is an uncountable noun, some articles should be added, such as faire du sport, faire de la gymnast, etc. This will make you think it is faire de, but it is not, or it is the case that faire is followed by a direct object.

Faire can also be used as a non-personal verb, and only the third person singular form fait is used to indicate weather conditions, such as:

I'm in love with Bo.

This is a fact.

This is a fact.

Today is the last day.

How are you?