If you try to allocate more than 128GB on swap partition for a Redhat installation you will notice that is not possible through installer. This is a known bug on Redhat bugzilla that is mentioned as resolved. However I tried to allocate 256GB swap with a RedHat 8.2 installer and I got the maximum size which is 128GB. In this article you will learn how to increase swap size manually.
First validate that there is available space on the volume group. (140g available on my case)
Then extend the swap logical volume
Deactivate swap file
Reactivate swap partition.
You can verify swap space with