Hi KP,
Here is a link to answer your first question about whether the main shelves, door bin, and freezer shelves are adjustable. Please see each section, follow the steps, and click the hyperlinks for further help.
Samsung refrigerator shelf/drawer removal and cleaning guide.
https://www.samsung.com/us/support/answer/ANS00063107/
The ice maker cannot be removed because it is built-in. Please reference the "Ice maker" section on page 59 of the user's manual.
Manual
https://downloadcenter.samsung.com/content/UM/202205/20220525154141895/RF9000A_DA68-04023H-04_EN_MES_CFR.pdf
Should you need more assistance, please feel free to get back to us via the following options:
1. Facebook Messenger: http://m.me/Samsungsupport
2. Twitter: https://twitter.com/messages/compose?recipient_id=18768513
3. Samsung Community: https://us.community.Samsung.com/t5/Samsung-Community/ct-p/us
When you message us, please provide us with this reference number 1146646972 to help our team pull up your information.
Have a great day.
^Aloe