Is it necessary to create a company account for each country?

If your company has a presence in more than one country, you do not need to create an account for each one.
On Get on Board you can indicate for which city each ad is published, so having a consolidated account for your company is simpler and more effective. This way, you will have all your processes at hand, no matter what country it is for.

Before creating your company account, check that it has not been previously created by another member of your team. If the account has already been created, you can ask the admin to send you an invitation to the team.