import re
l = 'https://'+'homepage.com/home/page1/222.6 a_type-A/go'
replace_with = '222.6'
# https://h...content-available-to-author-only...e.com/home/page1/222.6_type-A/go
print (re.sub('(page1/).*?(_type-A)',fr'\g<1>{replace_with}\2',l, flags=re.DOTALL))
aW1wb3J0IHJlCmwgPSAnaHR0cHM6Ly8nKydob21lcGFnZS5jb20vaG9tZS9wYWdlMS8yMjIuNiBhX3R5cGUtQS9nbycKcmVwbGFjZV93aXRoID0gJzIyMi42JwojIGh0dHBzOi8vaC4uLmNvbnRlbnQtYXZhaWxhYmxlLXRvLWF1dGhvci1vbmx5Li4uZS5jb20vaG9tZS9wYWdlMS8yMjIuNl90eXBlLUEvZ28KcHJpbnQgKHJlLnN1YignKHBhZ2UxLykuKj8oX3R5cGUtQSknLGZyJ1xnPDE+e3JlcGxhY2Vfd2l0aH1cMicsbCwgZmxhZ3M9cmUuRE9UQUxMKSk=