how do I adjust settings for the family member watch after the initial setup?

Greetings reneenicta,

You can learn how to manage that device here:

Set up a family member’s Apple Watch - Apple Support

"Manage a family member’s Apple Watch

1. Open the Apple Watch app on the iPhone used to manage the watch.
2. Tap My Watch, tap Family Watches, tap a watch, then tap Done.

When you tap My Watch for a managed watch, you see a variety of settings, including the following:

Setting

Options

General

Check for updates, change language and region, and reset Apple Watch.

Cellular

Set up cellular if you haven’t. See Add Apple Watch to your cellular plan.

Accessibility

Configure accessibility settings.

Emergency SOS

Turn on or off the option to hold the side button to call emergency services, and add and change emergency contacts.

Schooltime

Set up a Schooltime schedule. See Get started with Schooltime.

Screen Time

Manage parental controls, get insights about your family member’s screen time, and set limits.

Activity

Manage a fitness experience made for younger users.

Contacts

Choose trusted contacts.

Find My

Choose notification settings.

Handwashing

Manage restrictions, and turn the handwashing timer on or off.

Health

Add or edit health details and Medical ID, view the health data (with the proper permissions and settings) of the person who uses the managed Apple Watch, request to share health data, and choose to stop receiving health data.

Heart

View the heart data (with the proper permissions and settings) of the person who uses the managed Apple Watch, including heart rate, heart rate variability, resting heart rate, and walking heart rate average.

Mail & Calendar

Add a family member’s account—Gmail or Outlook, for example. Also choose how often Apple Watch fetches calendar updates.

Messages

Choose dictation options, and edit smart replies.

Noise

Turn Environmental Sound Measurements on or off, and set the noise threshold.

Photos

Select a photo album from the iPhone used to manage the watch, and choose the number of photos Apple Watch can display.

Wallet & Apple Pay

Set up Apple Cash and Express Transit cards.

Note: Not all features on an Apple Watch you set up for yourself are available on a managed Apple Watch. See the Apple Support article Set up Apple Watch for a family member."

Take care.