Hi @jayp60135
If the button you're referring looks like [https://www.searspartsdirect.com/product/l7gvm4a4o5-0046-795/id-abh74540602|this] then the [https://www.manualslib.com/manual/2676048/Lg-Lfcs27596s.html?page=103#manual|service manual] doesn't show it.
If it is then it is [https://www.partselect.com/PS11706796-LG-ABH74540602-BUTTON-ASSEMBLY.htm?SourceCode=3&SearchTerm=ABH74540602|door parts list - part ID #233E - LG part #ABH74540602]
If the button itself is the problem search for [https://www.google.com/search?client=firefox-b-d&q=ABH74540602|ABH74540602] to find suppliers that suit you best.
I couldn't find a video online that shows how to replace it. You may have better luck.