This is very confusing when Dell decided to re-use the model as same as 10 years old 7010. For your question, you should be able to install Windows 10 and you can find all Win 10 drivers from Dell support page.  As for the comment, you can customize Win 11 to get most options and features similar to Win 10, it may take a while to get use to with it.  It's your choice.
Just bought this 7010 and I'm considering whether I should return it or downgrade to Windows 10;  I would appreciate your comments: Windows 11 Pro was  the only option and I've just found the taskbar location setting doesn't exist (as it does in Windows 10)- unfortunately I can't live with this. So return or downgrade are my options. Can I install Windows 10 on this device? (Are the drivers for Win10 the same as those for Win11) . I assumed it should be straightforward, but the loss of the Taskbar location setting suggests I shouldn't assume, anything. Many thanks.   
Will the Optiplex 7010 - i5 - 13500 support Windows 10?