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-You could rotate your inductor 90degrees clockwise so that you GND return loop for your output capacitor leads back to the GND pad of the TPS54526 and the input capacitors.
-Is it possible to move the Bootstrap capacitor closer to the TPS54526? It should be ok where it is but the smaller the bootstrap loop the better.
-Prioritize the placement of C751 closer to the part by moving the soft-start capacitor C749. Actually swapping the position of these two parts would be good. The reason being that soft-start is only used in start up and it is a simple RC circuit where at the VREG5 capacitor is pulsed to drive the low side gate driver and charge the high-side boot-strap circuit meaning it is a high frequency power line that should be kept as short as possible.
Those would be some of my first thoughts after looking at the layout and guessing what passives are which between the schematic and the layout.
