Hi There,
Thank you for reaching out, and your interest if the Galaxy Tab A7 has Bluetooth. To answer your question, yes, it is Bluetooth active.
Please see its user manual on Page 24, 85 to 86 for your reference:
https://downloadcenter.samsung.com/content/UM/202106/20210623002343105/SAM_T220_T227_EN_UM_R11.0_060721_FINAL_AC.pdf
Should you need more assistance, you may reach us via the following for immediate support:
1. Samsung Community: https://us.community.samsung.com/t5/Samsung-Community/ct-p/us
2. Facebook Messenger: http://m.me/samsungsupport
3. Twitter: https://twitter.com/messages/compose?recepient_ id=18768513
Reference Number: 1144225302
Thank you for choosing Samsung. Have a great day!
^Chrystel