As long as the resource pack that you'd like to use on your server is not a premium one, it is possible to use a resource pack. If you would like to install a resource pack onto your Bedrock server, you can do so by following the steps in our "How do I install Addons, Resource Packs, or Behavior Packs on my Bedrock server?" article here.
Can I force players to use the resource packs on the server?
Yes! This can be done by enabling the "Force World Texture Pack" option in the "Settings" area of Prisma. Once enabled, save the changes and restart your server to apply the changes.