Transistors choice for buck boost converter using LM34936
The Voltage rating and  current ratings depends on each FET due to your Vin Max/Min Vgs and Vout.
If you reduce the range on input voltages, it is possible to have more common parts but \$Q_g\$ and \$Q_{gd}\$  increase with Vds and lower RdsOn which depends on these VI in/out ranges as a slower rise time also increases losses.