Class D power supply filtering for conducted emissions
Do re-read the datasheet:


  The TPA3112D1 is a high-performance CMOS audio amplifier that requires
  adequate power supply decoupling to ensure that the output total
  harmonic distortion (THD) is as low as possible. Power supply
  decoupling also prevents oscillations for long lead lengths between
  the amplifier and the speaker. Optimum decoupling is achieved by using
  a network of capacitors of different types that target specific types
  of noise on the power supply leads. For higher frequency transients
  due to parasitic circuit elements such as bond wire and copper trace
  inductances as well as lead frame capacitance, a good-quality, low
  equivalent-seriesresistance (ESR) ceramic capacitor from 220 pF to
  1000 pF works well. This capacitor must be placed as close to the
  device PVCC pins and system ground (either PGND pins or PowerPAD) as
  possible. For mid-frequency noise due to filter resonances or PWM
  switching transients as well as digital hash on the line, another
  goodquality capacitor typically 0.1 µF to 1 µF placed as close as
  possible to the device PVCC leads works best. For filtering lower
  frequency noise signals, a larger aluminum electrolytic capacitor of
  220 µF or greater placed near the audio power amplifier works well.
  The 220-µF capacitor also serves as a local storage capacitor for
  supplying current during large signal transients on the amplifier
  outputs. The PVCC pins provide the power to the output transistors, so
  a 220-µF or larger capacitor must be placed on each PVCC pin. A 10-µF
  capacitor on the AVCC pin is adequate. Also, a small decoupling
  resistor between AVCC and PVCC can be used to keep high frequency,
  Class-D noise from entering the linear input amplifiers.


Get at least 220uF low impedance cap. Also here are a few pointers to your layout. 3 circles in red, traces to thin to deliver higher power. 2 arrows in orange, shift the via holes to a new location; punch at least 3 vias per side. Layout examples in page 23 is better to follow for first prototype.