simul8or has been updated to provide 5 years of historical data across all tickers! The previous limits on simulations have been removed, so you now have full access to any stock you'd like to simulate.
I visited your website again and tried to trade APPL with data from 2021, but the data failed to load even though there was no notification that the date range was invalid. Is this behavior expected? I used a Chromium-based browser with an ads blocker. If I remember correctly, I can access the chart data just fine with an ad blocker enabled before. I don't think many people would use your website if you require them to unblock ads.
AAPL from 2021 should work provided you used an actual market date. Here's an example:
https://simul8or.com/AAPL/2021-06-10.php
as far as ads go, there are no ads in the app/site so very strange that your adblocker is having an issue with the site