In general, I disable the ability of getting a ‘read receipt’ if at all possible. In the case of some rare platforms that don’t allow this; I also warn people that "Seeing a ‘read receipt’ indicator does not mean I was available to reply.

In general; people who hang on to this little indicator are also committing a larger social faux pas, and you should { [(yellow/red) flag] / address / handle } it accordingly based on your relationship to that person, your goals and the situation.

Whether that means ‘calling them out’ or , kindly explaining what it actually means or explaining your approach to communications; the behavior of expecting something to happen on the receipt of a read receipt.