The phrase "Hope you are not stressed out as well" is an expression of concern or care about the other person's emotional well-being. It suggests that the speaker is aware that the other person might be dealing with a potentially stressful situation or circumstance, and they are expressing a wish or hope that the other person is not experiencing stress too.
In this context, "as well" means "also" or "in addition to." The speaker may be implying that they themselves are feeling stressed, and they don't want the other person to be burdened with stress on top of their own concerns. It could be a way of acknowledging that stress is common and expressing a desire for the other person to be doing well despite any challenges they may be facing.
For example, if someone says, "I've been dealing with a lot of work-related stress lately. Hope you are not stressed out as well," they are conveying their concern about the other person's stress levels, particularly in the context of work-related issues.
It's a thoughtful and empathetic way of expressing care and checking in on someone's emotional state.