MariaDB Frequently Restarting
Rate Per Second = RPS

Suggestions to consider for your my.cnf [mysqld] section

max_connect_errors=10  # from 1 Million to frustrate hackers/crackers at 10 attempts
innodb_lru_scan_depth=100  # from 1024 to conserve 90% of CPU cycles used for function
read_buffer_size=256K # from 128K to reduce handler_read_next RPS of 13,569
aria_pagecache_age_threshold=900  # from 300 to delay age out and reduce aria_pagecache_reads RPS of 1
connect_timeout=20  # from 10 to reduce aborted_connects RPhr of 60


There are more opportunities to improve your configuration.  Make contact, please.