Hi Alyk2000.Thank you for the interesting question regarding the Galaxy Tab A7, if you can connect a Bluetooth S-pen to it, this feature is not available to the device. If you are trying to connect a generic Bluetooth Pen please note this is something we do not recommend and cannot guarantee if it will work properly.
Please check the "Pen" section
https://www.samsung.com/us/tablets/tab-a7/compare/?device-1=galaxy-tab-a7&device-2=galaxy-tab-a7-lite&device-3=undefined
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
Reference Number: 1144198020
Have a great day.
^Charles