Hi,
Thanks for your query. By default it's not possible in this template. But if you want , It's not an easy task to do. You have to go through a little bit difficult procedure.
step:1 remove all the related css of testimonial pro from your site.
step:2 edit the line of code
https://prnt.sc/idjhma form here
templates/shaper_aspasia/sppagebuilder/addons/testimonialpro/site.php
That will bring up your desired look.
-Best Regards