all cruise lines extensively search everything and you are required to be away from your bags for extended periods of time during boarding. most cruise lines also explicitly ban things like all cybersecurity equipment (flippers were particularly looked for) power strips etc.

Royal caribbean got my friend pulled into security and questioned for hours for a RPI, and they permitted it but held it locked away separately until you deboard at the end of trip

you usually spend 4+ hours away until you see your bag again at boarding time