No, foreign pensions cannot be excluded on Form 2555. According to the retrieved information, foreign earned income does not include amounts received as pensions or annuities, including social security benefits. Specifically, "Subsection 911(b)(1)(B)(i)" of the Internal Revenue Code states that foreign earned income shall not include amounts received as a pension or annuity. Additionally, the instructions for Form 2555 explicitly mention that foreign earned income does not include pension or annuity payments. Therefore, foreign pensions are not eligible for exclusion under the foreign earned income exclusion on Form 2555.
Sources:
Publication 54 (2023)
Instructions for Form 2555 (2023)
§ 911. Citizens or residents of the United States living abroad
1040 (2023)
Instructions for Form 1040-NR (2023)
Instructions for Form 1116 (2023)
Instructions for Form 1120-F (2023)