See https://www.irs.gov/instructions/i1040gi#en_US_2022_publink100020293
Form 1040 or 1040-SR isn't considered a valid return unless you sign it in accordance with the requirements in these instructions. If you are filing a joint return, your spouse must also sign. If your spouse can't sign the return, see Pub. 501. Be sure to date your return and enter your occupation(s). If you have someone prepare your return, you are still responsible for the correctness of the return. If your return is signed by a representative for you, you must have a power of attorney attached that specifically authorizes the representative to sign your return. To do this, you can use Form 2848.
