I need to open an interface/site in a new tab by passing the data from the current tab

You could try a!urlForSite(), and wrap yourtext list items in a JSON string, but I'm not sure whether you'd run into a URL Parameter size limit if trying that approach.

I tried that but got characters limit

In that case you should probably figure out a solution where you write those entries to a DB table on the original interface, and just pass a unique key from your first interface to your second (via url parameters), then when the second one loads, query the database for values matching that unique key.

I tried this method but not through record type/ database.

I ran an process model and made an process report for that process model and I was able to fetch all the data by querying data from the process report. But the problem is I have to click on 2 buttons. One for to write the data and another one to open the site in a new Tab. Can I do both things in a single click?

I tried this method but not through record type/ database.

I ran an process model and made an process report for that process model and I was able to fetch all the data by querying data from the process report. But the problem is I have to click on 2 buttons. One for to write the data and another one to open the site in a new Tab. Can I do both things in a single click?