Thank you so much for using our theme Better Health and thank you so much for using the support forum for the query.
To change the text make appointement you can find the text in header.php file line 138. You can translate the text on your own language from here as well.
Moreover, you can find the polyglots plugin and can translate it as well.
For the View More button on the slider, you can find the codes inside section-parts/section-slider.php file and find the code for the button and remove it.
Note: Child Theme is recommended to customize the theme code.
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