Hello J!
the theme itself does not limit the number of levels of comments, it only styles the ones that are >5 levels deep without further indents, otherwise they’d become too narrow to be usable. Please use the standard native “Enable threaded (nested) comments X levels deep” in the “Other comment settings” section of the “Settings -> Discussion” admin menu to increase the number of possible comment reply levels.
Sincerely,
Andrii / Satori Studio