Linksys EA7500 V2

I have UK version of Linksys EA7500 V2 i try to connect 5g wifi with samsung phone but its not find 5g signal is it possible openwrt firmware enable 5g high band channel actually right now few channel show 36 to 48 but i need above 100
Thank You

@imranrahim3635, welcome to the community!

Do you have your wireless set to the proper nation?

Thank You for your reply how we set the nation there is no option there for change nation can you help me on this
Thank You