How many tags?

Hi there! I’m using tags on two of my websites: http://www.cliniciimplantdentar.ro/ and http://www.transplantimplantpar.ro/

on one i have not modified the implicit number of tags (45) on the other one i show only 10 tags.

What is the SEO safe tag number?

Thanks!

https://ww.wp.xz.cn/plugins/ultimate-tag-cloud-widget/