Though not strictly the same, computational Physics and Theoretical Physics have so much overlap around their functions and goals.
Computational physics is the study and implementation of numerical analysis for solving the problems in physics for which a quantitative theory already exists.

Theoretical physics is about developing mathematical models for physical processes and/or solving the resulting equations by using analytical techniques.

A theoretical physicist is a scientist who uses mathematics, calculations, chemistry, biology, and a series of theories to understand the complex workings of the universe and the interactions between matter and energy. They often attempt to understand areas that scientists are not currently capable of traveling to for exploration and data collection, such as the deep reaches of outer space and the ocean floor.
A computational physicist applies numerical analysis to solve problems or support theories in physics.
From the above, you can find their overlap in functions.

Computational/Theoretical physics is perhaps the highest-impact, lowest-cost area of basic research. The field advances our fundamental understanding of the universe and seeds the technologies of tomorrow. Solar cells, computers, wireless technologies, and diagnostic imaging are all rooted in breakthroughs made by theoretical physicists. The reason is simple: technology relies on the laws of nature, so a better understanding of those laws allows us to create more powerful ....continue https://www.marketgists.com/a-computationaltheoretical-physicist

Thank you for sharing.