Hi..may try the sequence as below
Login to amex app --> Click on membership --> click Redeem rewards
This will open the link -->
https://global.americanexpress.com/rewards ( you may directly click on this)
On phone it will be a mobile website. Click on the three bars on right of blue ribbon where membership points are mentioned.
View attachment 19491
click on Link ( underlined by red)
View attachment 19494
Click on dropdown " Apparals and accessories " and select gold collection 18k or 24k.
View attachment 19495
View attachment 19496
Select the required option and go ahead.
I hope it helps.
🙂
@Shash