I bought your Royal theme.
I installed wordpress and SSL corectly. I check, it was OK on differtent themes like Divi from elegant Themes, or this first random theme after wordpress installation.
Then I installed Royal Theme and I don’t have green padlock.
In htacccess I made redirections on https, I also installed plugin called: WP brutal SSL, but after that problemms. because I through it will solve the problem.
You can open a console in a browser and see problems with Mixed Content https://prnt.sc/iqiaqe, so you need to resolve these. Please, re-add the mentioned images to fix the issue.
Feel free to ask if you have any other questions.