For as long as Minecraft Bedrock has existed, I have used one particular skin on the platform, that being 'Kazooie' in the 'Birthday Skin Pack 2' Skin Pack. As of 1.14, the skin pack I have always used, including the skin I always use, has been listed as 'not available on multiplayer,' meaning I can not use it in multiplayer games, servers or realms. This is very confusing as it is an official skin pack from the legacy console editions, and has not got any non-multiplayer friendly skins. I do not doubt this same issue has occurred on other skin packs and I hope it gets fixed soon.