Since she's over a year old I wouldn't do PUPD, she was an independent sleeper so you would do Walk in Walk out instead.
If she's not crying, don't be in the room at all. Just leave her be until she's really crying.
With WIWO, you go in when she's genuinely crying, give her a quick cuddle, say your sleep phrase and help her lie down if you think she needs it, then walk out again (even if she immediately springs up and is still crying) and wait outside the door for a few moments and listen to what's happening. If she's still very upset, go in again and repeat. And/or you can try reassuring her with your voice from outside the door. My daughter hates WIWO, she gets furious, she settles much more quickly if I am outside the room but just repeat her sleep phrase until she settles.