No, not disrespectful, but questionable. Like just putting your pronouns is such a simple and easy thing to do. I'd be skeptical of anyone that had an issue with listing their pronouns.
Steam/Xbox/PSN = NoxObscuras
Z490 | i9-10900K | EVGA 3080 FTW3 Ultra | 32GB DDR4 3600 | 4TB SSD