Use HorizontalScrollViewerBehavior
MODIFY
WalletWasabi.Fluent/Views/Wallets/WalletView.axaml
WalletWasabi.Fluent/Views/Wallets/WalletView.axaml
VerticalAlignment="Top"
HorizontalScrollBarVisibility="Auto"
VerticalScrollBarVisibility="Auto">
+ <i:Interaction.Behaviors>
+ <behaviors:HorizontalScrollViewerBehavior RequireShiftKey="False" ScrollChangeSize="Page"/>
+ </i:Interaction.Behaviors>
<ItemsControl Items="{Binding Tiles}"
Margin="0 0"
HorizontalAlignment="Left"

Use HorizontalScrollViewerBehavior