RE this answer

User wants to find a "way to get around this 10-lookups-only limit"

The 10 lookup limit is a limit for DNS lookups. Flattening the SPF record to include less DNS lookups and substituting them for IPs (flattening) DOES get around the limit.

The answer is suitable. Maybe @DavidPostill needs to take a look at the RFC?

Question in focus is SPF Records causing too many DNS lookups