Trademark infringement is responsible for the majority of UDRP (Uniform Domain-Name Dispute-Resolution Policy) cases. Domain investors view such actions unfavorably, and the domain itself holds no value unless you intend to sell it to another party involved in trademark infringement. If a brand were to file a UDRP case, it appears that they would have a strong chance of winning.
Unless a domain was registered prior to the brand's establishment and is a common word in the dictionary, defending it may require significant expenses. By investing time and effort into a domain that gains visibility, you also increase the likelihood of becoming a target.
In some cases, if you succeed in defending your domain, such as a three-letter LLL (letter-letter-letter) dot com domain that serves as a generic abbreviation, the brand attempting to seize your domain may face a ruling of reverse domain name hijacking. There have been instances where large corporations have dedicated years of effort in attempting to acquire certain domains, as exemplified by the "Nissan" story.
As previously suggested, it is advisable to stop from incorporating a trademarked name directly into the domain. However, you can use the TM name within the website's content. You can fill all webpages with descriptions of your services, including the TM name, while also placing the "TM" symbol next to it as a precautionary measure. Unless you become a prominent entity, omitting the "TM" symbol may not have significant consequences.