Patternfly 5 password input fields use <InputGroup> and {{<InputGroupItem> , }}In our code we use the Patternfly 4 notation that does not use it.

We need to add the missing <InputGroup> and  <InputGroupItem> to our input fields where needed:

PF5 notation example:
      <InputGroup>
        <InputGroupItem isFill>
          <TextInput />
        </InputGroupItem>
        <InputGroupItem>
          <Button>
            {passwordHidden ? <EyeIcon /> : <EyeSlashIcon />}
          </Button>
        </InputGroupItem>
{{      </InputGroup>
}}
Our current code the input group items are missing:

<TextInput />
<Button >

</Button>