This has nothing to do with Bubble or your app setup.
You are loading almost 4MB of external javascript libreries (some sort of web3 stuff) with just 2 files in that list. Plus other external libraries, plus all Bubble’s code.
If you need all of that for your business logic then you need to accept that your app is not meant to be good for web vitals metrics. In this case you may want to consider to move your SEO pages somewhere else.