Look at it my way:

Instantaneous polarity method:

U 1+, output of A- (i.e. T-), collector of T+, left end of R2+, noninverting end of A+, output of A+,

Here, you will find that the effects of the second step and the sixth step are opposite.

That is, this circuit will stabilize the output, that is, negative feedback.

Judging negative feedback, we can grasp two places:

1, if the input is affected and the net input decreases, it is negative feedback;

2. If the output is affected and stabilized, it is also negative feedback.

The above two points, as long as they meet any point, can be considered as negative feedback.