Transition to 1 nap nightmare 😩😭

We have been transitioning to 1 nap for the past 2-3 weeks and it’s definitely been the hardest transition yet. My daughter is completely okay with having 4-5 hour awake windows and takes one nap (usually, depending on when she wakes in the morning), around 11:30-12:00. The problem is, she still hasn’t started lengthening her naps to adjust to only having one nap a day. Her naps have been anywhere from 40 minutes to 1.5 hr max. Im literally pulling my hairs out every time she naps and wakes up 40 minutes later. I know she’s tired but she refuses to nap longer. I know it can take time for her to adjust but this is definitely not easy. Her bedtime has been 6-6:30 for the past couple weeks which sucks because we can’t do much in the afternoons anymore. I know this phase will pass but I just needed to vent as I look at the monitor and she’s only been down for an hour and is already sitting there with her eyes wide open. 🤦🏾‍♀️Anyone else having nap related troubles