Combine the two regexes with the pipe symbol. It is the same as the logical OR. Here's a code snippet demonstrating how to use this.

import re

regex_list = ["^[\x20-\x7E]$", "\S(.*\S)"]
regex = '|'.join(regex_list)

print(regex)                       # ^[ -~]$|\S(.*\S)
print(re.search(regex, "C"))       #matches first pattern
print(re.search(regex, "CAT CAT")) #matches second pattern
print(re.search(regex, " 3 "))     #matches neither pattern

One way to do this is to use word boundaries (\b) instead of the \S anchor:

^\b[\x20-\x7E]*\b$

This would match your given test case Priya@ #432, but would not match priya##23á or Priya@ #432 . You can see an example of this regex in action on Regex101 here.