[Python] How do I code a CSS Selector to find a specific button, click on it, and wait until...

I have a working web scraper written in Python, Selenium and Chromedriver (all up-to-date version wise) and various other software packages. The target webpage has a field for the phone number, but you have to click a button to reveal it:


<button aria-busy="false" class="sc-adc2db3f-0 cLDdWI sc-608879d0-0 cbUwJX">
<div class="sc-eb45309b-0 kexGZq">
<svg aria-hidden="true" color="#373373" fill="none" focusable="false" height="24" viewbox="0 0 24 24" width="24" xmlns="http://www.w3.org/2000/svg">
<path d="M18.078 14.702c-.502-.6-1.506-.5-1.908.2-.602 1-.903 1.3-1.204 1.3-2.21-.3-6.928-5-7.129-7.2 0-.1 0-.3 1.406-1.2.703-.4.803-1.3.2-1.8-2.61-2.4-2.71-3-3.513-3-1.607 0-3.113 4-2.912 5.7.502 4 8.835 12.3 12.65 12.3 1.707 0 5.322-1.3 5.322-2.8.1-.8-.502-.9-2.912-3.5z" fill="#fff" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-miterlimit="10">
</path>
</svg>
<p class="sc-991ea11d-0 hCxFrC">
+1-XXX-XXX-XXXX
</p>
</div>
<p aria-label="Reveal phone number" class="sc-991ea11d-0 hCxFrC">
Reveal
</p>
</button>

Notice that the class names are all gobbledegook and have a tendency to change on me so I am trying to use names that will stay constant. The only thing I can think of is to use the TAG "button" and the ID 'p' with the attribute 'aria-label="Reveal phone number"'. I cannot figure out a CSS_SELECTOR that I can use with these values to do a fluent wait after I make sure that field is on the webpage. Here is the code I have tried. I know this is not enough to test, but I am hoping for some ideas on what else to try:

results = soup.find_all('p',attrs={'aria-label':'Reveal phone number'})
if re.search('Reveal phone number',str(results)):
elems = ''
try:
elems = webdwait.until(EC.presence_of_all_elements_located((By.CSS_SELECTOR,"[aria-label='Reveal phone number']")))
except Exception as err:
logging.info(f"ERROR F{flag}-70: Webpage element (PhoneRevealButton) search failed ...")
logging.info(f"ERROR F{flag}-70: type={type(err)}: {err}")
print(f" WARNING F{flag}-70: Webpage search failed ({type(err)}): trying again ...",flush=True)
failed = True

if not failed:
for elem in elems:
if re.search('Reveal phone number',str(elem.get_attribute('outerHTML'))):
driver.execute_script("arguments[0].scrollIntoView(true);",elem)
try:
driver.execute_script("arguments[0].click();",elem)
except Exception as err:
logging.info(f"ERROR F{flag}-71: Webpage element (PhoneRevealButton) search failed ...")
logging.info(f"ERROR F{flag}-71: type={type(err)}: {err}")
print(f" WARNING F{flag}-71: Webpage click failed ({type(err)}): trying again ...",flush=True)
failed = True

if not failed:
# Wait until these elements are updated
lcnt = 0
while True:
try:
elems = webdwait.until(EC.presence_of_all_elements_located((By.CSS_SELECTOR,"[aria-label='Reveal phone number']")))
except Exception as err:
# Element is gone?
logging.info(f"INFO F{flag}-72: type={type(err)}: {err}")
break
cnt = 0
for elem in elems:
if re.search('Reveal phone number',str(elem.get_attribute('outerHTML'))):
# Element still exists
cnt += 1
if cnt == 0:
break
lcnt += 1
if lcnt * timeout_wait2 >= timeout_dri:
print(f" ERROR: Waited too long for webpage to update - phone number not retrieved")
break
time.sleep(timeout_wait2)

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