Hello!
To insert subscription form in your Coming soon page, go to the main page of Coming soon plugin, choose your template and click “Edit Template” https://prnt.sc/fdtoy9. Then click on the plus icon https://prnt.sc/fdtqa8. You need to choose Subscribe Form tab https://prnt.sc/fdtqta. Drag the block you like at your Coming soon page. Then move your mouse on this block and click on the icon with three dots https://prnt.sc/fdtry2. You will see list of block settings, you need to choose Subscribe settings. There are 3 tabs: Main settings, Confirmation and New Subscriber – https://prnt.sc/fdtt1i . Set the needed Subscription options and save the changes (1), then save your template (2) https://prnt.sc/fdtve3. After this check your Coming Soon page on frontend.