The Mauler is one of the many generic archetypes introduced in the Advance Player's Guide, available to almost anyone with sufficient strength. In particular, the entry feat gives you proficiency with two-handed weapons and the rest of it focuses around these sorts of weapons (including co-opting some feats from Fighter).
In particular, this gives you plenty of ways to use combat maneuvers using big weapons, shoving enemies around and knocking them down.
|The Archetypes of Pathfinder 2nd Edition|
|Core Rule Book:||Alchemist - Barbarian - Bard - Champion - Cleric - Druid |
Fighter - Monk - Ranger - Rogue - Sorcerer - Wizard
|Lost Omens Setting Guide:||Crimson Assassin - Duelist - Guild Agent - Hellknight Armiger |
Lion Blade - Living Monolith - Magic Warrior - Runescarred - Sentry - Student of Perfection
|Adventure Path||Juggler Dedication - Staff Acrobat Archetype - Zephyr Guard Archetype|
|Advanced Player's Guide||Acrobat - Archaeologist - Archer - Assassin - Bastion - Beastmaster - Blessed One - Bounty Hunter - Cavalier - Celebrity - Dandy - Duelist - Eldritch Archer - Familiar Master - Gladiator - Herbalist - Horizon Walker - Investigator - Linguist- Loremaster - Marshal -Martial Artist - Mauler - Medic - Oracle - Pirate - Poisoner - Ritualist - Scout - Scroll Trickster - Scourger -Sentinel - Shadowdancer - Snarecrafter -Swashbuckler - Talisman Dabbler - Vigilante - Viking - Weapon Improviser -Witch|