import re
texto = '''
Data de fabricação: 20.02.2019
Validade: 30.12.2099
10-10/2019
10x10$2019
1021022019
'''
# pega os 3 valores do final
print(re.findall('\d{2}.\d{2}.\d{4}',texto))
# só pega os que tem "." como separador
print(re.findall('\d{2}\.\d{2}\.\d{4}',texto))
aW1wb3J0IHJlCnRleHRvID0gJycnCkRhdGEgZGUgZmFicmljYcOnw6NvOiAyMC4wMi4yMDE5ClZhbGlkYWRlOiAzMC4xMi4yMDk5CgoxMC0xMC8yMDE5CjEweDEwJDIwMTkKMTAyMTAyMjAxOQonJycKCiMgcGVnYSBvcyAzIHZhbG9yZXMgZG8gZmluYWwKcHJpbnQocmUuZmluZGFsbCgnXGR7Mn0uXGR7Mn0uXGR7NH0nLHRleHRvKSkKCiMgc8OzIHBlZ2Egb3MgcXVlIHRlbSAiLiIgY29tbyBzZXBhcmFkb3IKcHJpbnQocmUuZmluZGFsbCgnXGR7Mn1cLlxkezJ9XC5cZHs0fScsdGV4dG8pKQ==