If you want to change the text of Labels in Instant Search Widgets and Search & Collections page go through the following steps:
Go to your Shopify Admin Store > App > Searchly.
Click on Instant Search Widgets or Search & Collection Page to change the text of the Labels.
In both cases click on Translations and change the text of Labels, Messages, Sections, and many more.
Hit the Save button.
Instant Search Widgets:
Search & Collection Page: