Second button to appear on mobile header

Hi, I used CSS code to create a second button on my header and they are showing properly on both desktop and mobile. But when I click on the hamburger icon (mobile header) the second button disappears. What extra code can I add to make both buttons visible here? Appreciate any comments and support!

Can you share site url? We can check easier

Yes, my website is https://www.poolangelofficial.com/ 

Thank you so much it worked!

@Lesum I would also like to remove these two buttons when opening the hamburger menu now that they are showing in the main 'header' - do you have a code for this please?

@Karen147 You can add this code to hide the buttons when the hamburger menu is opened

.header--menu-open .header-menu-cta {
    display: none;
}