C# - How to sort a list of strings using last character by ignoring special character if any at the end

Below is the logic that i tried to implement and able to sort it but need to figure out to ignore special characters in it

My Logic:

• Reversed string in a list
• Sorted in ascending order
• Again reversed back sorted strings &

• Finally returned as a string by joining with ~ delimiter.

      List<String> inputLst= new List<String>() { "Bananas!", "Cherry2",
      "Mango","Apples", "Grape$", "Guava" };
  
      List<String> sortList = new List<String>();
      List<String> outputList = new List<String>();
  
      foreach (String str in inputLst)
      {
          sortList.Add(new String(str.ToCharArray().Reverse().ToArray()));
      }
      sortList.Sort();
  
      foreach (String str in sortList)
      {
          outputList.Add(new String(str.ToCharArray().Reverse().ToArray()));
      }
      Return String.Join("~", outputList);
  

Output i got is Bananas!~Grape$~Cherry2~Guava~Mango~Apples

Expected output should be Guava~Grape$~Mango~Bananas!~Apples~Cherry2

Could anyone please suggest me optimized solution to sort a list by last character by ignoring special characters? Here i used 2 lists for string reversals, can it be done in more efficient way? Note: without using LINQ pls.