Why does using salted hash on python and php give me different results?

PHP Snippet 1:

import hashlib
import secrets

ACCOUNT_NAME = 'MyTestLogin'
ACCOUNT_PASSWORD = 'MyTestPassword'

def calculateSRP6Verifier(ACCOUNT_NAME: str, ACCOUNT_PASSWORD: str, SALT: str):
    g = int(7)
    N = int('894B645E89E1535BBDAD5B8B290650530801B18EBFBF5E8FAB3C82872A3E9BB7', 16)
    h1 = bytes.fromhex(hashlib.sha1(((ACCOUNT_NAME + ':' + ACCOUNT_PASSWORD).upper()).encode()).hexdigest())
    h2 = int(bytes.fromhex(hashlib.sha1(bytes.fromhex(SALT) + h1).hexdigest())[::-1].hex(), 16)
    VERIFIER = bytes.fromhex(format(pow(g, h2, N), 'X').ljust(64, '0'))[::-1].hex().upper()
    return VERIFIER

def getRegistrationData(ACCOUNT_NAME: str, ACCOUNT_PASSWORD: str):
    SALT = secrets.token_hex(32)
    VERIFIER = calculateSRP6Verifier(ACCOUNT_NAME, ACCOUNT_PASSWORD, SALT)
    return SALT.upper(), VERIFIER

def verifySRP6(ACCOUNT_NAME: str, ACCOUNT_PASSWORD: str, SALT: str, VERIFIER: str):
    g = int(7)
    N = int('894B645E89E1535BBDAD5B8B290650530801B18EBFBF5E8FAB3C82872A3E9BB7', 16)
    x = int(bytes.fromhex(hashlib.sha1(bytes.fromhex(SALT) + bytes.fromhex(hashlib.sha1(((ACCOUNT_NAME + ':' + ACCOUNT_PASSWORD).upper()).encode()).hexdigest())).hexdigest())[::-1].hex(), 16)
    VERIFIER = bytes.fromhex(format(pow(g, x, N), "X").ljust(64, '0'))[::-1].hex().upper()
    return VERIFIER
    
RESULT = getRegistrationData(ACCOUNT_NAME, ACCOUNT_PASSWORD)
print('This is SRP6 crypto library for Trinity Core 335a World of Warcraft server.')
print('')
print('Login   : ' + ACCOUNT_NAME)
print('Password: ' + ACCOUNT_PASSWORD)
print('')
print('salt    : ' + RESULT[0])
print('verifier: ' + RESULT[1])

# Note, that SALT and VERIFIER saved to the database as a binary string (not as hexadecimal, that returned from getRegistrationData() function)!
# Therefore, when inserting data into the MySQL database, you need to use such a query:
sql = "INSERT INTO account (username, salt, verifier, email) VALUES ('" + ACCOUNT_NAME.upper() + "', X'" + SALT + "', X'" + VERIFIER + "', '" + ACCOUNT_EMAIL.upper() + "')"



# This is simple example, how registration data is being verified.
#
#CODE - is return from verifySRP6() function
#VERIFIER and SALT - saved data from the MySQL database, from account table, converted from binary to hexadecimal string in upper() mode.
# MySQL query must be:
#    cursor.execute("SELECT salt FROM account WHERE username = '" + ACCOUNT_NAME.upper() + "'")
#    SALT = (cursor.fetchone()['salt']).hex().upper()
#    cursor.execute("SELECT verifier FROM account WHERE username = '" + ACCOUNT_NAME.upper() + "'")
#    VERIFIER = (cursor.fetchone()['verifier']).hex().upper()
#
#
#CODE = verifySRP6(ACCOUNT_NAME, ACCOUNT_PASSWORD, SALT, VERIFIER)
#print('check   :', CODE)
#if(VERIFIER == CODE):
#    print('Password is OK!')
#else:
#    print('Wrong password!')