Hi,
You can set that page to show both primary and secondary sidebar, then add this custom CSS code to Appearance > Customize > Additional CSS, to hide the primary sidebar on the right.
.page-id-416 #main {
flex-basis: 75%;
max-width: 75%;
}
.page-id-416 #sidebar-secondary {
flex-basis: 25%;
max-width: 25%;
}
.page-id-416 #sidebar-primary {
display: none;
}
Get the page ID when editing the page https://share.getcloudapp.com/geuo97yn.