Element is missing in Page Source

I am facing strange issue while automating one feature in iOS, there is a two button available at the bottom of the page and when there are few records available on the page this 2 button will not be displayed so I need to scroll it to click on the button so when I scroll to the bottom of the page this two button will be displayed but when trying to identify this 2 button I’ll get no such element exception error while running so I checked with page source once test is failed but that element also missing in page source but when I checked the elements before starting test it was available so once appium scroll it element will not be available in page source. Could you please help into this?

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