Novels like Demon Summoner

All share Romance Subplot and LitRPG

Root Access: Second Chance as a Fantasy Sysadmin

Song of the Gift-Giver

Defiant Necromancer (Books 1 & 2 Stubbed)

Paradise Rock: A Swashbuckling LitRPG

Alpha Testers: Exodus Error

Reborn As An Overpowered Villain

Engine of Reincarnation

Taste of Magic: Archmage's Shadow

The lords command : cultivation novel with comedic twist

Assassinate Wonderwind

Also Strong Lead