Your debug log shows the following history for the past 24 hours (or when you installed Pi-hole, whichever is shorter):
[2023-12-15 07:41:54.776 1324M] Imported 4634 queries from the long-term database
[2023-12-15 07:41:54.776 1324M] -> Total DNS queries: 4634
[2023-12-15 07:41:54.776 1324M] -> Cached DNS queries: 772
[2023-12-15 07:41:54.776 1324M] -> Forwarded DNS queries: 2151
[2023-12-15 07:41:54.776 1324M] -> Blocked DNS queries: 1626
[2023-12-15 07:41:54.776 1324M] -> Unknown DNS queries: 0
[2023-12-15 07:41:54.776 1324M] -> Unique domains: 358
[2023-12-15 07:41:54.777 1324M] -> Unique clients: 8
[2023-12-15 07:41:54.777 1324M] -> Known forward destinations: 3
Pi-hole is receiving and properly processing queries, including blocking.
Use these tools to determine the source of the ads you are seeing: