getopt and case function not executing

I encountered such a problem when passing a parameter to a script, the function corresponding to the case menu is not executed. The script accepts parameters as input and performs the appropriate actions

#!/bin/bash

usage () {
echo " Usage:
-h, --help         #Displaying help
-p, --proc         #Working with directory /proc
-c, --cpu          #Working with CPU
-m, --memory       #Working with memory
-d, --disks        #Working with disks
-n, --network      #Working with networks
-la, --loadaverage #Displaying the load average on the system
-k, --kill         #Sending signals to processes
-o, --output       #Saving the results of script to disk"

exit2
}

proc () {
if [ -n "$1" ]
then
      if [ -z "$2" ]
      then
             ls /proc
      else
           cat /proc/"$2"
       fi
fi
}

parsed_arguments=$(getopt -o hp:c:m:d:n:la:k:o: --long help,proc:,cpu:,memory:,disks:,network:,loadaverage:,kill:,output:)
if [[ "${#}" -eq "" ]]
then
       usage
fi
eval set -- "$parsed_arguments"
while :
do
      case "$1" in
      -h | --help) echo " Showing usage!"; usage
       ;;
       -p | --proc) proc
       ;;
     esac
done

f the script does not receive any parameters, then a description of the options should be displayed, but if the script receives the first parameter starting with "-" or "--" as input, then the functions corresponding to the letter or word following the "-" or "--" should be executed. Example

No parameters:
./script.sh
 Usage:
-h, --help         #Displaying help
-p, --proc         #Working with directory /proc
-c, --cpu          #Working with CPU
-m, --memory       #Working with memory
-d, --disks        #Working with disks
-n, --network      #Working with networks
-la, --loadaverage #Displaying the load average on the system
-k, --kill         #Sending signals to processes
-o, --output       #Saving the results of script to disk"

With one parameters:
./script.sh -p
or
./script.sh --proc
The contents of the /proc directory should be displayed

With additional parameters:
 ]]./script.sh -p cpuinfo
or
./script.sh --proc cpuinfo
The contents of the file passed through the additional parameter should be displayed

A script without arguments is executed, but not with arguments. Can you tell me what could be the reason for the fact that when passing arguments to the script, the corresponding functions are not executed.