Pack Tactics: You have advantage on an attack roll against a creature if at least one of your allies is within 5 feet of the creature and the ally isn't incapacitated.
Grappling: When you want to grab a creature or wrestle with it, you can use the AttackAction to make a Special melee Attack, a grapple. If you’re able to make multiple attacks with the AttackAction, this Attack replaces one of them.
Shoving: Using the AttackAction, you can make a Special melee Attack to shove a creature, either to knock it prone or push it away from you. If you’re able to make multiple attacks with the AttackAction, this Attack replaces one of them.
Pack Tactics says you have advantage on attack rolls, and grappling and shoving are both attacks that require rolls. So, does the advantage from the kobold's pack tactics apply to grapple and shove attacks?
No. Pack Tactics gives you Advantage on Attack Rolls, not Ability Checks.
From the Grappling rules: "Using at least one free hand, you try to seize the target by making a grapple check instead of an attack roll: a Strength (Athletics) check contested by the target’s Strength (Athletics) or Dexterity (Acrobatics) check (the target chooses the ability to use)." - https://www.dndbeyond.com/sources/phb/combat#Grappling
From the Shoving a Creature rules: "Instead of making an attack roll, you make a Strength (Athletics) check contested by the target’s Strength (Athletics) or Dexterity (Acrobatics) check (the target chooses the ability to use)." - https://www.dndbeyond.com/sources/phb/combat#ShovingaCreature
In both cases you are explicitly not making an Attack Roll.
There are a bunch of ways to gain advantage on Strength checks though. The most common of which is the Barbarian's Rage, but there is also the Rune Knight's Giant's Might, or spells like Enlarge/Reduce or Enhance Ability. Also as a Skill Check getting Expertise in Athletics applies to your Grapple and Shove attacks.
Pack Tactics: You have advantage on an attack roll against a creature if at least one of your allies is within 5 feet of the creature and the ally isn't incapacitated.
Grappling: When you want to grab a creature or wrestle with it, you can use the Attack Action to make a Special melee Attack, a grapple. If you’re able to make multiple attacks with the Attack Action, this Attack replaces one of them.
Shoving: Using the Attack Action, you can make a Special melee Attack to shove a creature, either to knock it prone or push it away from you. If you’re able to make multiple attacks with the Attack Action, this Attack replaces one of them.
Pack Tactics says you have advantage on attack rolls, and grappling and shoving are both attacks that require rolls. So, does the advantage from the kobold's pack tactics apply to grapple and shove attacks?
No. Pack Tactics gives you Advantage on Attack Rolls, not Ability Checks.
From the Grappling rules: "Using at least one free hand, you try to seize the target by making a grapple check instead of an attack roll: a Strength (Athletics) check contested by the target’s Strength (Athletics) or Dexterity (Acrobatics) check (the target chooses the ability to use)." - https://www.dndbeyond.com/sources/phb/combat#Grappling
From the Shoving a Creature rules: "Instead of making an attack roll, you make a Strength (Athletics) check contested by the target’s Strength (Athletics) or Dexterity (Acrobatics) check (the target chooses the ability to use)." - https://www.dndbeyond.com/sources/phb/combat#ShovingaCreature
In both cases you are explicitly not making an Attack Roll.
I see. Thanks a bunch
There are a bunch of ways to gain advantage on Strength checks though. The most common of which is the Barbarian's Rage, but there is also the Rune Knight's Giant's Might, or spells like Enlarge/Reduce or Enhance Ability. Also as a Skill Check getting Expertise in Athletics applies to your Grapple and Shove attacks.
No it does not. Those are ability checks, not attack rolls. Exceptions are Battle Master Tripping/Pushing strike.