Yes, you can register a trademark even if you are not manufacturing.
Trademarks protect your brand name, logo, or symbol, and they can be registered for products or services you intend to use in the future. In many countries, you just need to show a genuine intention to use the mark in business. Later, when you start manufacturing or selling, you can prove actual use.
In our own industry (automotive components at Auto International), trademarks help build trust with OEMs and customers — so even before production, securing a trademark is a smart step for brand protection.