Embed is not transparent when overlapping another embed

So I’m using Chart.JS to creat a Kids BMI chart, the problem is that I have to use two separate charts due to capped limit and it being a simpler solution altogether. The problem is that when I use absolute to stack one embed over the other, only one graph shows (Yes it’s also transparent in the coding.) I believe it has something to do on Webflows part, not sure how to fix this.
ezgif.com-gif-maker (1)

Here is my site Read-Only: (https://preview.webflow.com/preview/yfnacademy?utm_medium=preview_link&utm_source=designer&utm_content=yfnacademy&preview=0d6feb4ede60f65453d787a2552a22eb&pageId=6220771b08941c8f7786b81e&itemId=6220771b08941c1dc986b946&workflow=preview)