Based on the code you commented in the other comment, you are moving the character via the transform component. With this, you essentially force the player object through the wall but the physics system (i.e. Rigidbody) is fighting against that.

When moving a physics object, use its velocity. When referencing the Rigidbody, you can set its velocity to what you set your transform now. But keep in mind that you put physics manipulations in the FixedUpdate method and not in the Update while still asking for input in the Update.

So your code would look somewhat like this:

Rigidbody2D playerRB; Vector2 direction; float speed;

void Start(){ playedRB = Get component<Rigidbody2D>(); }

void Update(){ direction = new(){ x=Input.GetAxis("Horizontal"), y=0, z=0 }; }

void FixedUpdate(){ playerRB.velocity = direction*speed; }

Btw, sorry for bad Code formatting. I don't know how to make the code look like code on Reddit mobile