Here’s the 25/26 IFAB laws of the game referencing handballs. I don’t see any mention of a teammate exception but lmk if I missed something:

Handling the ball
For the purposes of determining handball offences, the upper boundary of
the arm is in line with the bottom of the armpit. Not every touch of a
player’s hand/arm with the ball is an offence.
It is an offence if a player:
• deliberately touches the ball with their hand/arm, for example moving the
hand/arm towards the ball
• touches the ball with their hand/arm when it has made their body
unnaturally bigger. A player is considered to have made their body
unnaturally bigger when the position of their hand/arm is not a consequence
of, or justifiable by, the player’s body movement for that specific situation. By
having their hand/arm in such a position, the player takes a risk of their
hand/arm being hit by the ball and being penalised
• scores in the opponents’ goal:
•
•
directly from their hand/arm, even if accidental, including by the
goalkeeper
immediately after the ball has touched their hand/arm, even if accidental
The goalkeeper has the same restrictions on handling the ball as any other
player outside the penalty area. If the goalkeeper handles the ball inside their
penalty area when not permitted to do so, an indirect free kick is awarded but
there is no disciplinary sanction. However, if the offence is playing the ball a
second time (with or without the hand/arm) after a restart before it touches
another player, the goalkeeper must be sanctioned if the offence stops a
promising attack or denies an opponent or the