The 2020 model of Canyon al 7.0 gravel bike does not come with eyelets: https://www.canyon.com/en-sk/road-bikes/gravel-bikes/grail/grail-al-7.0/2370.html

But for longer tours ( for what I would like to use it too ) would need to mount a rear rack. So the manufacturer does not advice to put on adjustable racks, for example: https://www.amazon.com/dp/B07219CDH7/ref=cm_sw_r_apa_i_BN9EEbNX5G26G

But could it do really harm to an aluminum bike?

Thanks!