Can i tie the enable pins directly to the rails?
From the datasheet you link for the first one.

the application does not require the use of the shutdown feature, the EN pin can be tied directly to the IN pin to
keep the regulator output permanently on.

No pullup needed.
For the second:

Active low enable: When this pin is high, all switches are turned off. When this pin is low, SEL pin controls the signal path selection. Internal 6 MΩ pull-down to GND.

You can leave it disconnected and it will be on. If 6 Megaohm isnt enough for a stable on, you could connect directly to ground without issue.