Hold on hold on.
The Anubias are rhizome plants. The rhizome is the long base that the leaeves and roots are growing from. This portion of the plant must not be buried in the substrate, but there is nothing wrong with the roots getting into the substrate (which it will do over time if you let it!). They won't "die" because you "planted" them.
Laterite will always help, but is not necessary. Its a supplemental product that provides many resourceful nutrients to the root zone of plants over time. For new people to the hobby, its always a plus. Its not cheap, but works.
The microswords must be planted in the substrate.
Some people also use other products under a capping substrate to provide additional nutrients. Osmocote, potting soil (must do research on this), mineralized topsoil, peat moss, worm casings, to name a few. There are also a number of fertilization "sticks" available on the market, Jobes being one that is quite common and safe to use.
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