I am unable to link from my Gamma site out to a web page at https://age-estimator.parallelchain-lab.io because your system has determined that the URL is "suspicious". Gamma support let me know that you use three different scanning systems and the blocking of the hyperlink is to protect your servers and customers. But there is actually nothing wrong with the URL I am trying to link to. I don't know of any other website building tool that would completely block a hyperlink to a website, especially since I am linking out away from the Gamma site to a _new browser window.
There should be a way for a human to override the categorization by the three scanning systems, as they are clearly labeling safe websites as "suspicious".